77322979 has 2 divisors, whose sum is σ = 77322980. Its totient is φ = 77322978.

The previous prime is 77322977. The next prime is 77322991. The reversal of 77322979 is 97922377.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77322979 - 2¹ = 77322977 is a prime.

Together with 77322977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (77322977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38661489 + 38661490.

It is an arithmetic number, because the mean of its divisors is an integer number (38661490).

Almost surely, 2^77322979 is an apocalyptic number.

77322979 is a deficient number, since it is larger than the sum of its proper divisors (1).

77322979 is an equidigital number, since it uses as much as digits as its factorization.

77322979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396, while the sum is 46.

The square root of 77322979 is about 8793.3485658195. The cubic root of 77322979 is about 426.0260863334.

The spelling of 77322979 in words is "seventy-seven million, three hundred twenty-two thousand, nine hundred seventy-nine".