139969956 has 24 divisors (see below), whose sum is σ = 373253440. Its totient is φ = 39991392.

The previous prime is 139969939. The next prime is 139969961. The reversal of 139969956 is 659969931.

It is a junction number, because it is equal to n+sod(n) for n = 139969896 and 139969905.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 833071 + ... + 833238.

Almost surely, 2^139969956 is an apocalyptic number.

It is an amenable number.

139969956 is an abundant number, since it is smaller than the sum of its proper divisors (233283484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139969956 is a wasteful number, since it uses less digits than its factorization.

139969956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666323 (or 1666321 counting only the distinct ones).

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

The square root of 139969956 is about 11830.8899073569. The cubic root of 139969956 is about 519.2122638866.

The spelling of 139969956 in words is "one hundred thirty-nine million, nine hundred sixty-nine thousand, nine hundred fifty-six".