77319953 has 2 divisors, whose sum is σ = 77319954. Its totient is φ = 77319952.

The previous prime is 77319947. The next prime is 77319967. The reversal of 77319953 is 35991377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68840209 + 8479744 = 8297^2 + 2912^2 .

It is a cyclic number.

It is not a de Polignac number, because 77319953 - 2⁶ = 77319889 is a prime.

It is not a weakly prime, because it can be changed into another prime (77349953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38659976 + 38659977.

It is an arithmetic number, because the mean of its divisors is an integer number (38659977).

Almost surely, 2^77319953 is an apocalyptic number.

It is an amenable number.

77319953 is a deficient number, since it is larger than the sum of its proper divisors (1).

77319953 is an equidigital number, since it uses as much as digits as its factorization.

77319953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 178605, while the sum is 44.

The square root of 77319953 is about 8793.1765022658. The cubic root of 77319953 is about 426.0205288145.

The spelling of 77319953 in words is "seventy-seven million, three hundred nineteen thousand, nine hundred fifty-three".