97777765 has 8 divisors (see below), whose sum is σ = 117532800. Its totient is φ = 78089232.

The previous prime is 97777759. The next prime is 97777769. The reversal of 97777765 is 56777779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97777765 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97777769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13329 + ... + 19318.

It is an arithmetic number, because the mean of its divisors is an integer number (14691600).

Almost surely, 2^97777765 is an apocalyptic number.

It is an amenable number.

97777765 is a deficient number, since it is larger than the sum of its proper divisors (19755035).

97777765 is a wasteful number, since it uses less digits than its factorization.

97777765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33251.

The product of its digits is 4537890, while the sum is 55.

The square root of 97777765 is about 9888.2640033527. The cubic root of 97777765 is about 460.6948619326.

The spelling of 97777765 in words is "ninety-seven million, seven hundred seventy-seven thousand, seven hundred sixty-five".