139924609 has 16 divisors (see below), whose sum is σ = 155643840. Its totient is φ = 124724160.

The previous prime is 139924601. The next prime is 139924633. The reversal of 139924609 is 906429931.

It is not a de Polignac number, because 139924609 - 2³ = 139924601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139924601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274647 + ... + 275155.

It is an arithmetic number, because the mean of its divisors is an integer number (9727740).

Almost surely, 2^139924609 is an apocalyptic number.

It is an amenable number.

139924609 is a deficient number, since it is larger than the sum of its proper divisors (15719231).

139924609 is a wasteful number, since it uses less digits than its factorization.

139924609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 139924609 is about 11828.9732859619. The cubic root of 139924609 is about 519.1561869439.

The spelling of 139924609 in words is "one hundred thirty-nine million, nine hundred twenty-four thousand, six hundred nine".