1656907979 has 2 divisors, whose sum is σ = 1656907980. Its totient is φ = 1656907978.

The previous prime is 1656907961. The next prime is 1656908027. The reversal of 1656907979 is 9797096561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1656907979 - 2⁸ = 1656907723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1656907919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828453989 + 828453990.

It is an arithmetic number, because the mean of its divisors is an integer number (828453990).

Almost surely, 2^1656907979 is an apocalyptic number.

1656907979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656907979 is an equidigital number, since it uses as much as digits as its factorization.

1656907979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6429780, while the sum is 59.

The square root of 1656907979 is about 40705.1345532723. The cubic root of 1656907979 is about 1183.3125296261.

The spelling of 1656907979 in words is "one billion, six hundred fifty-six million, nine hundred seven thousand, nine hundred seventy-nine".