97216911 has 24 divisors (see below), whose sum is σ = 153653760. Its totient is φ = 58741200.

The previous prime is 97216891. The next prime is 97216921. The reversal of 97216911 is 11961279.

It is not a de Polignac number, because 97216911 - 2¹⁰ = 97215887 is a prime.

It is a super-2 number, since 2×97216911² = 18902255568763842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97216921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36226 + ... + 38816.

It is an arithmetic number, because the mean of its divisors is an integer number (6402240).

Almost surely, 2^97216911 is an apocalyptic number.

97216911 is a deficient number, since it is larger than the sum of its proper divisors (56436849).

97216911 is a wasteful number, since it uses less digits than its factorization.

97216911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987 (or 2984 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 97216911 is about 9859.8636400307. The cubic root of 97216911 is about 459.8123226200.

The spelling of 97216911 in words is "ninety-seven million, two hundred sixteen thousand, nine hundred eleven".