501894973 has 4 divisors (see below), whose sum is σ = 515459740. Its totient is φ = 488330208.

The previous prime is 501894947. The next prime is 501894989. The reversal of 501894973 is 379498105.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 446138884 + 55756089 = 21122^2 + 7467^2 .

It is a cyclic number.

It is not a de Polignac number, because 501894973 - 2²¹ = 499797821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501894473) 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, 6782328 + ... + 6782401.

It is an arithmetic number, because the mean of its divisors is an integer number (128864935).

Almost surely, 2^501894973 is an apocalyptic number.

It is an amenable number.

501894973 is a deficient number, since it is larger than the sum of its proper divisors (13564767).

501894973 is a wasteful number, since it uses less digits than its factorization.

501894973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13564766.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 501894973 is about 22403.0125875963. The cubic root of 501894973 is about 794.7019559703.

The spelling of 501894973 in words is "five hundred one million, eight hundred ninety-four thousand, nine hundred seventy-three".