553121923 has 4 divisors (see below), whose sum is σ = 555325848. Its totient is φ = 550918000.

The previous prime is 553121867. The next prime is 553121927. The reversal of 553121923 is 329121355.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 553121923 - 2²⁵ = 519567491 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (553121927) 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, 1101586 + ... + 1102087.

It is an arithmetic number, because the mean of its divisors is an integer number (138831462).

Almost surely, 2^553121923 is an apocalyptic number.

553121923 is a deficient number, since it is larger than the sum of its proper divisors (2203925).

553121923 is a wasteful number, since it uses less digits than its factorization.

553121923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203924.

The product of its digits is 8100, while the sum is 31.

The square root of 553121923 is about 23518.5442364106. The cubic root of 553121923 is about 820.8685636100.

The spelling of 553121923 in words is "five hundred fifty-three million, one hundred twenty-one thousand, nine hundred twenty-three".