139124737 has 4 divisors (see below), whose sum is σ = 142360240. Its totient is φ = 135889236.

The previous prime is 139124731. The next prime is 139124759. The reversal of 139124737 is 737421931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 737421931 = 13789 ⋅53479.

It is a cyclic number.

It is not a de Polignac number, because 139124737 - 2¹¹ = 139122689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139124696 and 139124705.

It is not an unprimeable number, because it can be changed into a prime (139124731) 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, 1617687 + ... + 1617772.

It is an arithmetic number, because the mean of its divisors is an integer number (35590060).

Almost surely, 2^139124737 is an apocalyptic number.

It is an amenable number.

139124737 is a deficient number, since it is larger than the sum of its proper divisors (3235503).

139124737 is an equidigital number, since it uses as much as digits as its factorization.

139124737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235502.

The product of its digits is 31752, while the sum is 37.

The square root of 139124737 is about 11795.1149634075. The cubic root of 139124737 is about 518.1650525247.

The spelling of 139124737 in words is "one hundred thirty-nine million, one hundred twenty-four thousand, seven hundred thirty-seven".