407928979 has 2 divisors, whose sum is σ = 407928980. Its totient is φ = 407928978.

The previous prime is 407928973. The next prime is 407929057. The reversal of 407928979 is 979829704.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-407928979 is a prime.

It is not a weakly prime, because it can be changed into another prime (407928973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203964489 + 203964490.

It is an arithmetic number, because the mean of its divisors is an integer number (203964490).

Almost surely, 2^407928979 is an apocalyptic number.

407928979 is a deficient number, since it is larger than the sum of its proper divisors (1).

407928979 is an equidigital number, since it uses as much as digits as its factorization.

407928979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 407928979 is about 20197.2517684956. The cubic root of 407928979 is about 741.6429159980.

The spelling of 407928979 in words is "four hundred seven million, nine hundred twenty-eight thousand, nine hundred seventy-nine".