77074813 has 2 divisors, whose sum is σ = 77074814. Its totient is φ = 77074812.

The previous prime is 77074799. The next prime is 77074847. The reversal of 77074813 is 31847077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58644964 + 18429849 = 7658^2 + 4293^2 .

It is a cyclic number.

It is not a de Polignac number, because 77074813 - 2²⁵ = 43520381 is a prime.

It is equal to p_4508659 and since 77074813 and 4508659 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77074853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38537406 + 38537407.

It is an arithmetic number, because the mean of its divisors is an integer number (38537407).

Almost surely, 2^77074813 is an apocalyptic number.

It is an amenable number.

77074813 is a deficient number, since it is larger than the sum of its proper divisors (1).

77074813 is an equidigital number, since it uses as much as digits as its factorization.

77074813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 77074813 is about 8779.2262187507. The cubic root of 77074813 is about 425.5698248158.

The spelling of 77074813 in words is "seventy-seven million, seventy-four thousand, eight hundred thirteen".