501399973 has 2 divisors, whose sum is σ = 501399974. Its totient is φ = 501399972.

The previous prime is 501399919. The next prime is 501399991. The reversal of 501399973 is 379993105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465135489 + 36264484 = 21567^2 + 6022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501399973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501394973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250699986 + 250699987.

It is an arithmetic number, because the mean of its divisors is an integer number (250699987).

Almost surely, 2^501399973 is an apocalyptic number.

It is an amenable number.

501399973 is a deficient number, since it is larger than the sum of its proper divisors (1).

501399973 is an equidigital number, since it uses as much as digits as its factorization.

501399973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 501399973 is about 22391.9622409471. The cubic root of 501399973 is about 794.4406085538.

The spelling of 501399973 in words is "five hundred one million, three hundred ninety-nine thousand, nine hundred seventy-three".