139695969 has 32 divisors (see below), whose sum is σ = 218121984. Its totient is φ = 77875200.

The previous prime is 139695967. The next prime is 139696003. The reversal of 139695969 is 969596931.

It is not a de Polignac number, because 139695969 - 2¹ = 139695967 is a prime.

It is a super-2 number, since 2×139695969² = 39029927509697922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139695967) 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 in 31 ways as a sum of consecutive naturals, for example, 348169 + ... + 348569.

It is an arithmetic number, because the mean of its divisors is an integer number (6816312).

Almost surely, 2^139695969 is an apocalyptic number.

It is an amenable number.

139695969 is a deficient number, since it is larger than the sum of its proper divisors (78426015).

139695969 is a wasteful number, since it uses less digits than its factorization.

139695969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its digits is 3542940, while the sum is 57.

The square root of 139695969 is about 11819.3049288019. The cubic root of 139695969 is about 518.8732617721.

The spelling of 139695969 in words is "one hundred thirty-nine million, six hundred ninety-five thousand, nine hundred sixty-nine".