97472181 has 4 divisors (see below), whose sum is σ = 129962912. Its totient is φ = 64981452.

The previous prime is 97472173. The next prime is 97472191. The reversal of 97472181 is 18127479.

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: 18127479 = 3 ⋅6042493.

It is not a de Polignac number, because 97472181 - 2³ = 97472173 is a prime.

It is a super-2 number, since 2×97472181² = 19001652137793522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97472191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16245361 + ... + 16245366.

It is an arithmetic number, because the mean of its divisors is an integer number (32490728).

Almost surely, 2^97472181 is an apocalyptic number.

It is an amenable number.

97472181 is a deficient number, since it is larger than the sum of its proper divisors (32490731).

97472181 is a wasteful number, since it uses less digits than its factorization.

97472181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32490730.

The product of its digits is 28224, while the sum is 39.

The square root of 97472181 is about 9872.8000587473. The cubic root of 97472181 is about 460.2144258662.

The spelling of 97472181 in words is "ninety-seven million, four hundred seventy-two thousand, one hundred eighty-one".