505970831 has 2 divisors, whose sum is σ = 505970832. Its totient is φ = 505970830.

The previous prime is 505970771. The next prime is 505970837. The reversal of 505970831 is 138079505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505970831 - 2¹⁴ = 505954447 is a prime.

It is a super-2 number, since 2×505970831² = 512012963645661122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505970837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252985415 + 252985416.

It is an arithmetic number, because the mean of its divisors is an integer number (252985416).

Almost surely, 2^505970831 is an apocalyptic number.

505970831 is a deficient number, since it is larger than the sum of its proper divisors (1).

505970831 is an equidigital number, since it uses as much as digits as its factorization.

505970831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 505970831 is about 22493.7953889511. The cubic root of 505970831 is about 796.8474005276.

The spelling of 505970831 in words is "five hundred five million, nine hundred seventy thousand, eight hundred thirty-one".