77951413 has 2 divisors, whose sum is σ = 77951414. Its totient is φ = 77951412.

The previous prime is 77951407. The next prime is 77951417. The reversal of 77951413 is 31415977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68260644 + 9690769 = 8262^2 + 3113^2 .

It is an emirp because it is prime and its reverse (31415977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77951413 - 2⁵ = 77951381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77951417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38975706 + 38975707.

It is an arithmetic number, because the mean of its divisors is an integer number (38975707).

Almost surely, 2^77951413 is an apocalyptic number.

It is an amenable number.

77951413 is a deficient number, since it is larger than the sum of its proper divisors (1).

77951413 is an equidigital number, since it uses as much as digits as its factorization.

77951413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 77951413 is about 8829.0097406221. The cubic root of 77951413 is about 427.1771336455.

The spelling of 77951413 in words is "seventy-seven million, nine hundred fifty-one thousand, four hundred thirteen".