501390887 has 2 divisors, whose sum is σ = 501390888. Its totient is φ = 501390886.

The previous prime is 501390863. The next prime is 501390893. The reversal of 501390887 is 788093105.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501390887 - 2¹⁶ = 501325351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501390287) by changing a digit.

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, 250695443 + 250695444.

It is an arithmetic number, because the mean of its divisors is an integer number (250695444).

Almost surely, 2^501390887 is an apocalyptic number.

501390887 is a deficient number, since it is larger than the sum of its proper divisors (1).

501390887 is an equidigital number, since it uses as much as digits as its factorization.

501390887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 501390887 is about 22391.7593547269. The cubic root of 501390887 is about 794.4358097695.

The spelling of 501390887 in words is "five hundred one million, three hundred ninety thousand, eight hundred eighty-seven".