3138668723 has 4 divisors (see below), whose sum is σ = 3138891288. Its totient is φ = 3138446160.

The previous prime is 3138668719. The next prime is 3138668737. The reversal of 3138668723 is 3278668313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3138668723 - 2² = 3138668719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138668713) 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, 88586 + ... + 118847.

It is an arithmetic number, because the mean of its divisors is an integer number (784722822).

Almost surely, 2^3138668723 is an apocalyptic number.

3138668723 is a deficient number, since it is larger than the sum of its proper divisors (222565).

3138668723 is a wasteful number, since it uses less digits than its factorization.

3138668723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222564.

The product of its digits is 870912, while the sum is 47.

The square root of 3138668723 is about 56023.8228167268. The cubic root of 3138668723 is about 1464.1373734836.

The spelling of 3138668723 in words is "three billion, one hundred thirty-eight million, six hundred sixty-eight thousand, seven hundred twenty-three".