715138623 has 6 divisors (see below), whose sum is σ = 1032978024. Its totient is φ = 476759076.

The previous prime is 715138621. The next prime is 715138639. The reversal of 715138623 is 326831517.

715138623 is a `hidden beast` number, since 7 + 15 + 13 + 8 + 623 = 666.

It is not a de Polignac number, because 715138623 - 2¹ = 715138621 is a prime.

It is a super-2 number, since 2×715138623² = 1022846500212672258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715138621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39729915 + ... + 39729932.

It is an arithmetic number, because the mean of its divisors is an integer number (172163004).

Almost surely, 2^715138623 is an apocalyptic number.

715138623 is a deficient number, since it is larger than the sum of its proper divisors (317839401).

715138623 is a wasteful number, since it uses less digits than its factorization.

715138623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79459853 (or 79459850 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 715138623 is about 26742.0758917478. The cubic root of 715138623 is about 894.2591886957.

The spelling of 715138623 in words is "seven hundred fifteen million, one hundred thirty-eight thousand, six hundred twenty-three".