139124413 has 4 divisors (see below), whose sum is σ = 147308220. Its totient is φ = 130940608.

The previous prime is 139124411. The next prime is 139124443. The reversal of 139124413 is 314421931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314421931 = 2251 ⋅139681.

It can be written as a sum of positive squares in 2 ways, for example, as 127848249 + 11276164 = 11307^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 139124413 - 2¹ = 139124411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139124411) 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, 4091878 + ... + 4091911.

It is an arithmetic number, because the mean of its divisors is an integer number (36827055).

Almost surely, 2^139124413 is an apocalyptic number.

It is an amenable number.

139124413 is a deficient number, since it is larger than the sum of its proper divisors (8183807).

139124413 is an equidigital number, since it uses as much as digits as its factorization.

139124413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8183806.

The product of its digits is 2592, while the sum is 28.

The square root of 139124413 is about 11795.1012289001. The cubic root of 139124413 is about 518.1646502823.

The spelling of 139124413 in words is "one hundred thirty-nine million, one hundred twenty-four thousand, four hundred thirteen".