97290981 has 6 divisors (see below), whose sum is σ = 140531430. Its totient is φ = 64860648.

The previous prime is 97290979. The next prime is 97291009. The reversal of 97290981 is 18909279.

It can be written as a sum of positive squares in only one way, i.e., 87890625 + 9400356 = 9375^2 + 3066^2 .

It is not a de Polignac number, because 97290981 - 2¹ = 97290979 is a prime.

It is a super-2 number, since 2×97290981² = 18931069967884722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97290971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5405046 + ... + 5405063.

It is an arithmetic number, because the mean of its divisors is an integer number (23421905).

Almost surely, 2^97290981 is an apocalyptic number.

It is an amenable number.

97290981 is a deficient number, since it is larger than the sum of its proper divisors (43240449).

97290981 is a wasteful number, since it uses less digits than its factorization.

97290981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10810115 (or 10810112 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 97290981 is about 9863.6190619873. The cubic root of 97290981 is about 459.9290706642.

The spelling of 97290981 in words is "ninety-seven million, two hundred ninety thousand, nine hundred eighty-one".