97197381 has 32 divisors (see below), whose sum is σ = 153146880. Its totient is φ = 60715008.

The previous prime is 97197349. The next prime is 97197391. The reversal of 97197381 is 18379179.

It is not a de Polignac number, because 97197381 - 2⁵ = 97197349 is a prime.

It is a super-2 number, since 2×97197381² = 18894661746518322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97197391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168165 + ... + 168741.

It is an arithmetic number, because the mean of its divisors is an integer number (4785840).

Almost surely, 2^97197381 is an apocalyptic number.

It is an amenable number.

97197381 is a deficient number, since it is larger than the sum of its proper divisors (55949499).

97197381 is a wasteful number, since it uses less digits than its factorization.

97197381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 964 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 97197381 is about 9858.8732114781. The cubic root of 97197381 is about 459.7815298427.

The spelling of 97197381 in words is "ninety-seven million, one hundred ninety-seven thousand, three hundred eighty-one".