501397972 has 6 divisors (see below), whose sum is σ = 877446458. Its totient is φ = 250698984.

The previous prime is 501397957. The next prime is 501397991. The reversal of 501397972 is 279793105.

It can be written as a sum of positive squares in only one way, i.e., 438734916 + 62663056 = 20946^2 + 7916^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62674743 + ... + 62674750.

Almost surely, 2^501397972 is an apocalyptic number.

It is an amenable number.

501397972 is a deficient number, since it is larger than the sum of its proper divisors (376048486).

501397972 is a wasteful number, since it uses less digits than its factorization.

501397972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125349497 (or 125349495 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 501397972 is about 22391.9175596910. The cubic root of 501397972 is about 794.4395517277.

The spelling of 501397972 in words is "five hundred one million, three hundred ninety-seven thousand, nine hundred seventy-two".