97928911 has 4 divisors (see below), whose sum is σ = 101305800. Its totient is φ = 94552024.

The previous prime is 97928881. The next prime is 97928921. The reversal of 97928911 is 11982979.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97928911 - 2⁵ = 97928879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97928921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1688401 + ... + 1688458.

It is an arithmetic number, because the mean of its divisors is an integer number (25326450).

Almost surely, 2^97928911 is an apocalyptic number.

97928911 is a deficient number, since it is larger than the sum of its proper divisors (3376889).

97928911 is a wasteful number, since it uses less digits than its factorization.

97928911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376888.

The product of its digits is 81648, while the sum is 46.

The square root of 97928911 is about 9895.9037485214. The cubic root of 97928911 is about 460.9321222033.

It can be divided in two parts, 979289 and 11, that added together give a triangular number (979300 = T₁₃₉₉).

The spelling of 97928911 in words is "ninety-seven million, nine hundred twenty-eight thousand, nine hundred eleven".