513372923 has 4 divisors (see below), whose sum is σ = 586711920. Its totient is φ = 440033928.

The previous prime is 513372911. The next prime is 513372929. The reversal of 513372923 is 329273315.

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 513372923 - 2⁴ = 513372907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513372929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36669488 + ... + 36669501.

It is an arithmetic number, because the mean of its divisors is an integer number (146677980).

Almost surely, 2^513372923 is an apocalyptic number.

513372923 is a deficient number, since it is larger than the sum of its proper divisors (73338997).

513372923 is an equidigital number, since it uses as much as digits as its factorization.

513372923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73338996.

The product of its digits is 34020, while the sum is 35.

The square root of 513372923 is about 22657.7342865521. The cubic root of 513372923 is about 800.7144258672.

The spelling of 513372923 in words is "five hundred thirteen million, three hundred seventy-two thousand, nine hundred twenty-three".