623138637 has 8 divisors (see below), whose sum is σ = 906383520. Its totient is φ = 377659760.

The previous prime is 623138627. The next prime is 623138647. The reversal of 623138637 is 736831326.

It is an interprime number because it is at equal distance from previous prime (623138627) and next prime (623138647).

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 623138637 - 2¹⁸ = 622876493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623138595 and 623138604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623138627) 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, 9441462 + ... + 9441527.

It is an arithmetic number, because the mean of its divisors is an integer number (113297940).

Almost surely, 2^623138637 is an apocalyptic number.

It is an amenable number.

623138637 is a deficient number, since it is larger than the sum of its proper divisors (283244883).

623138637 is a wasteful number, since it uses less digits than its factorization.

623138637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18883003.

The product of its digits is 108864, while the sum is 39.

The square root of 623138637 is about 24962.7449812716. The cubic root of 623138637 is about 854.1383597562.

The spelling of 623138637 in words is "six hundred twenty-three million, one hundred thirty-eight thousand, six hundred thirty-seven".