97211965 has 8 divisors (see below), whose sum is σ = 116723160. Its totient is φ = 77723712.

The previous prime is 97211951. The next prime is 97211971. The reversal of 97211965 is 56911279.

It can be written as a sum of positive squares in 4 ways, for example, as 4782969 + 92428996 = 2187^2 + 9614^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 97211965 - 2⁹ = 97211453 is a prime.

It is a super-2 number, since 2×97211965² = 18900332278322450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5647 + ... + 15043.

It is an arithmetic number, because the mean of its divisors is an integer number (14590395).

Almost surely, 2^97211965 is an apocalyptic number.

It is an amenable number.

97211965 is a deficient number, since it is larger than the sum of its proper divisors (19511195).

97211965 is a wasteful number, since it uses less digits than its factorization.

97211965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11471.

The product of its digits is 34020, while the sum is 40.

The square root of 97211965 is about 9859.6128220128. The cubic root of 97211965 is about 459.8045246957.

The spelling of 97211965 in words is "ninety-seven million, two hundred eleven thousand, nine hundred sixty-five".