97929997 has 4 divisors (see below), whose sum is σ = 106832736. Its totient is φ = 89027260.

The previous prime is 97929983. The next prime is 97930033. The reversal of 97929997 is 79992979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97929997 - 2¹⁵ = 97897229 is a prime.

It is a super-3 number, since 3×97929997³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97929907) 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, 4451353 + ... + 4451374.

It is an arithmetic number, because the mean of its divisors is an integer number (26708184).

Almost surely, 2^97929997 is an apocalyptic number.

It is an amenable number.

97929997 is a deficient number, since it is larger than the sum of its proper divisors (8902739).

97929997 is a wasteful number, since it uses less digits than its factorization.

97929997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8902738.

The product of its digits is 5786802, while the sum is 61.

The square root of 97929997 is about 9895.9586195578. The cubic root of 97929997 is about 460.9338260598.

It can be divided in two parts, 979 and 29997, that added together give a square (30976 = 176²).

The spelling of 97929997 in words is "ninety-seven million, nine hundred twenty-nine thousand, nine hundred ninety-seven".