505952391 has 24 divisors (see below), whose sum is σ = 785998080. Its totient is φ = 288653232.

The previous prime is 505952383. The next prime is 505952399. The reversal of 505952391 is 193259505.

It is an interprime number because it is at equal distance from previous prime (505952383) and next prime (505952399).

It is not a de Polignac number, because 505952391 - 2³ = 505952383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505952399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103300 + ... + 108086.

It is an arithmetic number, because the mean of its divisors is an integer number (32749920).

Almost surely, 2^505952391 is an apocalyptic number.

505952391 is a deficient number, since it is larger than the sum of its proper divisors (280045689).

505952391 is a wasteful number, since it uses less digits than its factorization.

505952391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523 (or 5516 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 39.

The square root of 505952391 is about 22493.3854944070. The cubic root of 505952391 is about 796.8377200983.

The spelling of 505952391 in words is "five hundred five million, nine hundred fifty-two thousand, three hundred ninety-one".