139624641 has 36 divisors (see below), whose sum is σ = 225673812. Its totient is φ = 85870368.

The previous prime is 139624619. The next prime is 139624649. The reversal of 139624641 is 146426931.

139624641 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 2 + 4 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11029041 + 128595600 = 3321^2 + 11340^2 .

It is not a de Polignac number, because 139624641 - 2⁵ = 139624609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139624596 and 139624605.

It is not an unprimeable number, because it can be changed into a prime (139624649) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84475 + ... + 86111.

It is an arithmetic number, because the mean of its divisors is an integer number (6268717).

Almost surely, 2^139624641 is an apocalyptic number.

It is an amenable number.

139624641 is a deficient number, since it is larger than the sum of its proper divisors (86049171).

139624641 is an frugal number, since it uses more digits than its factorization.

139624641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1653 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 139624641 is about 11816.2871072093. The cubic root of 139624641 is about 518.7849354514.

The spelling of 139624641 in words is "one hundred thirty-nine million, six hundred twenty-four thousand, six hundred forty-one".