623130421 has 4 divisors (see below), whose sum is σ = 650223072. Its totient is φ = 596037772.

The previous prime is 623130407. The next prime is 623130439. The reversal of 623130421 is 124031326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 623130421 - 2¹⁵ = 623097653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623130392 and 623130401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623130481) 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, 13546291 + ... + 13546336.

It is an arithmetic number, because the mean of its divisors is an integer number (162555768).

Almost surely, 2^623130421 is an apocalyptic number.

It is an amenable number.

623130421 is a deficient number, since it is larger than the sum of its proper divisors (27092651).

623130421 is a wasteful number, since it uses less digits than its factorization.

623130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27092650.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 623130421 is about 24962.5804154939. The cubic root of 623130421 is about 854.1346058395.

Adding to 623130421 its reverse (124031326), we get a palindrome (747161747).

It can be divided in two parts, 623 and 130421, that added together give a square (131044 = 362²).

The spelling of 623130421 in words is "six hundred twenty-three million, one hundred thirty thousand, four hundred twenty-one".