623715397 has 8 divisors (see below), whose sum is σ = 660657816. Its totient is φ = 586801152.

The previous prime is 623715377. The next prime is 623715419. The reversal of 623715397 is 793517326.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 187991521 + 435723876 = 13711^2 + 20874^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 623715397 - 2¹⁵ = 623682629 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 (623715317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53463 + ... + 64075.

It is an arithmetic number, because the mean of its divisors is an integer number (82582227).

Almost surely, 2^623715397 is an apocalyptic number.

It is an amenable number.

623715397 is a deficient number, since it is larger than the sum of its proper divisors (36942419).

623715397 is a wasteful number, since it uses less digits than its factorization.

623715397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14087.

The product of its digits is 238140, while the sum is 43.

The square root of 623715397 is about 24974.2947247765. The cubic root of 623715397 is about 854.4018008270.

The spelling of 623715397 in words is "six hundred twenty-three million, seven hundred fifteen thousand, three hundred ninety-seven".