77943253 has 2 divisors, whose sum is σ = 77943254. Its totient is φ = 77943252.

The previous prime is 77943233. The next prime is 77943287. The reversal of 77943253 is 35234977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73307844 + 4635409 = 8562^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 77943253 - 2⁵ = 77943221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77943233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38971626 + 38971627.

It is an arithmetic number, because the mean of its divisors is an integer number (38971627).

Almost surely, 2^77943253 is an apocalyptic number.

It is an amenable number.

77943253 is a deficient number, since it is larger than the sum of its proper divisors (1).

77943253 is an equidigital number, since it uses as much as digits as its factorization.

77943253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 40.

The square root of 77943253 is about 8828.5476155481. The cubic root of 77943253 is about 427.1622274071.

The spelling of 77943253 in words is "seventy-seven million, nine hundred forty-three thousand, two hundred fifty-three".