77979607 has 2 divisors, whose sum is σ = 77979608. Its totient is φ = 77979606.

The previous prime is 77979599. The next prime is 77979613. The reversal of 77979607 is 70697977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77979607 - 2³ = 77979599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77979677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38989803 + 38989804.

It is an arithmetic number, because the mean of its divisors is an integer number (38989804).

Almost surely, 2^77979607 is an apocalyptic number.

77979607 is a deficient number, since it is larger than the sum of its proper divisors (1).

77979607 is an equidigital number, since it uses as much as digits as its factorization.

77979607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166886, while the sum is 52.

The square root of 77979607 is about 8830.6062645778. The cubic root of 77979607 is about 427.2286288864.

The spelling of 77979607 in words is "seventy-seven million, nine hundred seventy-nine thousand, six hundred seven".