90381197 has 8 divisors (see below), whose sum is σ = 98998200. Its totient is φ = 82130944.

The previous prime is 90381173. The next prime is 90381211. The reversal of 90381197 is 79118309.

It can be written as a sum of positive squares in 4 ways, for example, as 48636676 + 41744521 = 6974^2 + 6461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-90381197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90381197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90381167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91172 + ... + 92157.

It is an arithmetic number, because the mean of its divisors is an integer number (12374775).

Almost surely, 2^90381197 is an apocalyptic number.

It is an amenable number.

90381197 is a deficient number, since it is larger than the sum of its proper divisors (8617003).

90381197 is a wasteful number, since it uses less digits than its factorization.

90381197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183375.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 90381197 is about 9506.9025975867. The cubic root of 90381197 is about 448.7722864556.

The spelling of 90381197 in words is "ninety million, three hundred eighty-one thousand, one hundred ninety-seven".