501939923 has 2 divisors, whose sum is σ = 501939924. Its totient is φ = 501939922.

The previous prime is 501939901. The next prime is 501939937. The reversal of 501939923 is 329939105.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501939923 is a prime.

It is not a weakly prime, because it can be changed into another prime (501932923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250969961 + 250969962.

It is an arithmetic number, because the mean of its divisors is an integer number (250969962).

Almost surely, 2^501939923 is an apocalyptic number.

501939923 is a deficient number, since it is larger than the sum of its proper divisors (1).

501939923 is an equidigital number, since it uses as much as digits as its factorization.

501939923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 501939923 is about 22404.0157784269. The cubic root of 501939923 is about 794.7256799155.

The spelling of 501939923 in words is "five hundred one million, nine hundred thirty-nine thousand, nine hundred twenty-three".