623454553 has 4 divisors (see below), whose sum is σ = 625251600. Its totient is φ = 621657508.

The previous prime is 623454541. The next prime is 623454563. The reversal of 623454553 is 355454326.

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 623454553 - 2⁵ = 623454521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623454563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 898003 + ... + 898696.

It is an arithmetic number, because the mean of its divisors is an integer number (156312900).

Almost surely, 2^623454553 is an apocalyptic number.

It is an amenable number.

623454553 is a deficient number, since it is larger than the sum of its proper divisors (1797047).

623454553 is a wasteful number, since it uses less digits than its factorization.

623454553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797046.

The product of its digits is 216000, while the sum is 37.

The square root of 623454553 is about 24969.0719290886. The cubic root of 623454553 is about 854.2826777677.

The spelling of 623454553 in words is "six hundred twenty-three million, four hundred fifty-four thousand, five hundred fifty-three".