3138517457 has 4 divisors (see below), whose sum is σ = 3139025316. Its totient is φ = 3138009600.

The previous prime is 3138517439. The next prime is 3138517511. The reversal of 3138517457 is 7547158313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7547158313 = 17 ⋅443950489.

It can be written as a sum of positive squares in 2 ways, for example, as 2299777936 + 838739521 = 47956^2 + 28961^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138517457 - 2¹⁸ = 3138255313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138517427) 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, 244544 + ... + 257057.

It is an arithmetic number, because the mean of its divisors is an integer number (784756329).

Almost surely, 2^3138517457 is an apocalyptic number.

It is an amenable number.

3138517457 is a deficient number, since it is larger than the sum of its proper divisors (507859).

3138517457 is an equidigital number, since it uses as much as digits as its factorization.

3138517457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507858.

The product of its digits is 352800, while the sum is 44.

The square root of 3138517457 is about 56022.4727854814. The cubic root of 3138517457 is about 1464.1138520715.

The spelling of 3138517457 in words is "three billion, one hundred thirty-eight million, five hundred seventeen thousand, four hundred fifty-seven".