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BaseRepresentation
bin1011100111011…
…00101010101101
320210100101022221
411303230222231
5144421012011
613400235341
72262132625
oct563545255
9223311287
1097438381
1150001997
122876bb51
1317257861
14cd25885
15884a971

97438381 has 4 divisors (see below), whose sum is σ = 97461952. Its totient is φ = 97414812.

The previous prime is 97438361. The next prime is 97438409. The reversal of 97438381 is 18383479.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18383479 = 179102701.

It is a cyclic number.

It is not a de Polignac number, because 97438381 - 25 = 97438349 is a prime.

It is a super-2 number, since 2×974383812 = 18988476183802322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97438361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3765 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (24365488).

It is a 4134-hyperperfect number.

Almost surely, 297438381 is an apocalyptic number.

It is an amenable number.

97438381 is a deficient number, since it is larger than the sum of its proper divisors (23571).

97438381 is a wasteful number, since it uses less digits than its factorization.

97438381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23570.

The product of its digits is 145152, while the sum is 43.

The square root of 97438381 is about 9871.0881365734. The cubic root of 97438381 is about 460.1612242047.

The spelling of 97438381 in words is "ninety-seven million, four hundred thirty-eight thousand, three hundred eighty-one".

Divisors: 1 5347 18223 97438381