3947500979 has 2 divisors, whose sum is σ = 3947500980. Its totient is φ = 3947500978.

The previous prime is 3947500957. The next prime is 3947500987. The reversal of 3947500979 is 9790057493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947500979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3947500979.

It is not a weakly prime, because it can be changed into another prime (3947500939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973750489 + 1973750490.

It is an arithmetic number, because the mean of its divisors is an integer number (1973750490).

Almost surely, 2^3947500979 is an apocalyptic number.

3947500979 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947500979 is an equidigital number, since it uses as much as digits as its factorization.

3947500979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 3947500979 is about 62829.1411607703. The cubic root of 3947500979 is about 1580.4256956625.

The spelling of 3947500979 in words is "three billion, nine hundred forty-seven million, five hundred thousand, nine hundred seventy-nine".