139635799 has 2 divisors, whose sum is σ = 139635800. Its totient is φ = 139635798.

The previous prime is 139635781. The next prime is 139635863. The reversal of 139635799 is 997536931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139635799 - 2¹⁷ = 139504727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139635779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69817899 + 69817900.

It is an arithmetic number, because the mean of its divisors is an integer number (69817900).

Almost surely, 2^139635799 is an apocalyptic number.

139635799 is a deficient number, since it is larger than the sum of its proper divisors (1).

139635799 is an equidigital number, since it uses as much as digits as its factorization.

139635799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 52.

The square root of 139635799 is about 11816.7592427027. The cubic root of 139635799 is about 518.7987545216.

The spelling of 139635799 in words is "one hundred thirty-nine million, six hundred thirty-five thousand, seven hundred ninety-nine".