76728979 has 2 divisors, whose sum is σ = 76728980. Its totient is φ = 76728978.

The previous prime is 76728961. The next prime is 76728991. The reversal of 76728979 is 97982767.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76728979 - 2¹⁵ = 76696211 is a prime.

It is not a weakly prime, because it can be changed into another prime (76728959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38364489 + 38364490.

It is an arithmetic number, because the mean of its divisors is an integer number (38364490).

Almost surely, 2^76728979 is an apocalyptic number.

76728979 is a deficient number, since it is larger than the sum of its proper divisors (1).

76728979 is an equidigital number, since it uses as much as digits as its factorization.

76728979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 55.

The square root of 76728979 is about 8759.5079199690. The cubic root of 76728979 is about 424.9323610928.

The spelling of 76728979 in words is "seventy-six million, seven hundred twenty-eight thousand, nine hundred seventy-nine".