39097979 has 2 divisors, whose sum is σ = 39097980. Its totient is φ = 39097978.

The previous prime is 39097957. The next prime is 39098023. The reversal of 39097979 is 97979093.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39097979 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39097979.

It is not a weakly prime, because it can be changed into another prime (39097939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19548989 + 19548990.

It is an arithmetic number, because the mean of its divisors is an integer number (19548990).

Almost surely, 2^39097979 is an apocalyptic number.

39097979 is a deficient number, since it is larger than the sum of its proper divisors (1).

39097979 is an equidigital number, since it uses as much as digits as its factorization.

39097979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 964467, while the sum is 53.

The square root of 39097979 is about 6252.8376758077. The cubic root of 39097979 is about 339.4048961337.

The spelling of 39097979 in words is "thirty-nine million, ninety-seven thousand, nine hundred seventy-nine".