77700897 has 16 divisors (see below), whose sum is σ = 121884480. Its totient is φ = 48753216.

The previous prime is 77700869. The next prime is 77700907. The reversal of 77700897 is 79800777.

It is not a de Polignac number, because 77700897 - 2⁷ = 77700769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77700697) 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, 84183 + ... + 85100.

It is an arithmetic number, because the mean of its divisors is an integer number (7617780).

Almost surely, 2^77700897 is an apocalyptic number.

It is an amenable number.

77700897 is a deficient number, since it is larger than the sum of its proper divisors (44183583).

77700897 is a wasteful number, since it uses less digits than its factorization.

77700897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169309 (or 169303 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 45.

The square root of 77700897 is about 8814.8112288352. The cubic root of 77700897 is about 426.7190296927.

Subtracting from 77700897 its product of nonzero digits (172872), we obtain a square (77528025 = 8805²).

The spelling of 77700897 in words is "seventy-seven million, seven hundred thousand, eight hundred ninety-seven".