97774997 has 4 divisors (see below), whose sum is σ = 97856556. Its totient is φ = 97693440.

The previous prime is 97774981. The next prime is 97775011. The reversal of 97774997 is 79947779.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61606801 + 36168196 = 7849^2 + 6014^2 .

It is a cyclic number.

It is not a de Polignac number, because 97774997 - 2⁴ = 97774981 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 (97774927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38954 + ... + 41387.

It is an arithmetic number, because the mean of its divisors is an integer number (24464139).

Almost surely, 2^97774997 is an apocalyptic number.

It is an amenable number.

97774997 is a deficient number, since it is larger than the sum of its proper divisors (81559).

97774997 is a wasteful number, since it uses less digits than its factorization.

97774997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81558.

The product of its digits is 7001316, while the sum is 59.

The square root of 97774997 is about 9888.1240384615. The cubic root of 97774997 is about 460.6905146068.

The spelling of 97774997 in words is "ninety-seven million, seven hundred seventy-four thousand, nine hundred ninety-seven".