77793953 has 2 divisors, whose sum is σ = 77793954. Its totient is φ = 77793952.

The previous prime is 77793949. The next prime is 77794021. The reversal of 77793953 is 35939777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77141089 + 652864 = 8783^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 77793953 - 2² = 77793949 is a prime.

It is not a weakly prime, because it can be changed into another prime (77793913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38896976 + 38896977.

It is an arithmetic number, because the mean of its divisors is an integer number (38896977).

Almost surely, 2^77793953 is an apocalyptic number.

It is an amenable number.

77793953 is a deficient number, since it is larger than the sum of its proper divisors (1).

77793953 is an equidigital number, since it uses as much as digits as its factorization.

77793953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1250235, while the sum is 50.

The square root of 77793953 is about 8820.0880381094. The cubic root of 77793953 is about 426.8893105437.

The spelling of 77793953 in words is "seventy-seven million, seven hundred ninety-three thousand, nine hundred fifty-three".