139869908 has 12 divisors (see below), whose sum is σ = 247523220. Its totient is φ = 69148992.

The previous prime is 139869907. The next prime is 139869911. The reversal of 139869908 is 809968931.

139869908 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23833924 + 116035984 = 4882^2 + 10772^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 139869908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139869907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196091 + ... + 196802.

It is an arithmetic number, because the mean of its divisors is an integer number (20626935).

Almost surely, 2^139869908 is an apocalyptic number.

It is an amenable number.

139869908 is a deficient number, since it is larger than the sum of its proper divisors (107653312).

139869908 is a wasteful number, since it uses less digits than its factorization.

139869908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392986 (or 392984 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 139869908 is about 11826.6608981572. The cubic root of 139869908 is about 519.0885265464.

The spelling of 139869908 in words is "one hundred thirty-nine million, eight hundred sixty-nine thousand, nine hundred eight".