77316953 has 6 divisors (see below), whose sum is σ = 89940186. Its totient is φ = 66271632.

The previous prime is 77316949. The next prime is 77316959. The reversal of 77316953 is 35961377.

It can be written as a sum of positive squares in only one way, i.e., 77299264 + 17689 = 8792^2 + 133^2 .

It is not a de Polignac number, because 77316953 - 2² = 77316949 is a prime.

It is a super-2 number, since 2×77316953² = 11955822442408418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77316953.

It is not an unprimeable number, because it can be changed into a prime (77316959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788900 + ... + 788997.

It is an arithmetic number, because the mean of its divisors is an integer number (14990031).

Almost surely, 2^77316953 is an apocalyptic number.

It is an amenable number.

77316953 is a deficient number, since it is larger than the sum of its proper divisors (12623233).

77316953 is a wasteful number, since it uses less digits than its factorization.

77316953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577911 (or 1577904 counting only the distinct ones).

The product of its digits is 119070, while the sum is 41.

The square root of 77316953 is about 8793.0059137931. The cubic root of 77316953 is about 426.0150189037.

The spelling of 77316953 in words is "seventy-seven million, three hundred sixteen thousand, nine hundred fifty-three".