97777745 has 16 divisors (see below), whose sum is σ = 127334592. Its totient is φ = 71647680.

The previous prime is 97777741. The next prime is 97777759. The reversal of 97777745 is 54777779.

It is a happy number.

It is not a de Polignac number, because 97777745 - 2² = 97777741 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97777741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2774 + ... + 14256.

It is an arithmetic number, because the mean of its divisors is an integer number (7958412).

Almost surely, 2^97777745 is an apocalyptic number.

It is an amenable number.

97777745 is a deficient number, since it is larger than the sum of its proper divisors (29556847).

97777745 is a wasteful number, since it uses less digits than its factorization.

97777745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11632.

The product of its digits is 3025260, while the sum is 53.

The square root of 97777745 is about 9888.2629920527. The cubic root of 97777745 is about 460.6948305216.

It can be divided in two parts, 9777774 and 5, that added together give a palindrome (9777779).

The spelling of 97777745 in words is "ninety-seven million, seven hundred seventy-seven thousand, seven hundred forty-five".