39504999979 has 2 divisors, whose sum is σ = 39504999980. Its totient is φ = 39504999978.

The previous prime is 39504999953. The next prime is 39505000043. The reversal of 39504999979 is 97999940593.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39504999979 - 2¹³ = 39504991787 is a prime.

It is not a weakly prime, because it can be changed into another prime (39504999679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19752499989 + 19752499990.

It is an arithmetic number, because the mean of its divisors is an integer number (19752499990).

Almost surely, 2^39504999979 is an apocalyptic number.

39504999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

39504999979 is an equidigital number, since it uses as much as digits as its factorization.

39504999979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 223205220, while the sum is 73.

The spelling of 39504999979 in words is "thirty-nine billion, five hundred four million, nine hundred ninety-nine thousand, nine hundred seventy-nine".