623458109 has 4 divisors (see below), whose sum is σ = 624371616. Its totient is φ = 622544604.

The previous prime is 623458063. The next prime is 623458117. The reversal of 623458109 is 901854326.

It is a happy number.

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 623458109 - 2¹⁶ = 623392573 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 (623458159) 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, 455729 + ... + 457094.

It is an arithmetic number, because the mean of its divisors is an integer number (156092904).

Almost surely, 2^623458109 is an apocalyptic number.

It is an amenable number.

623458109 is a deficient number, since it is larger than the sum of its proper divisors (913507).

623458109 is an equidigital number, since it uses as much as digits as its factorization.

623458109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913506.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 623458109 is about 24969.1431370802. The cubic root of 623458109 is about 854.2843019563.

The spelling of 623458109 in words is "six hundred twenty-three million, four hundred fifty-eight thousand, one hundred nine".