531386377 has 2 divisors, whose sum is σ = 531386378. Its totient is φ = 531386376.

The previous prime is 531386293. The next prime is 531386399. The reversal of 531386377 is 773683135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499790736 + 31595641 = 22356^2 + 5621^2 .

It is a cyclic number.

It is not a de Polignac number, because 531386377 - 2⁷ = 531386249 is a prime.

It is a super-2 number, since 2×531386377² = 564742963322372258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (531386077) 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 as a sum of consecutive naturals, namely, 265693188 + 265693189.

It is an arithmetic number, because the mean of its divisors is an integer number (265693189).

Almost surely, 2^531386377 is an apocalyptic number.

It is an amenable number.

531386377 is a deficient number, since it is larger than the sum of its proper divisors (1).

531386377 is an equidigital number, since it uses as much as digits as its factorization.

531386377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The square root of 531386377 is about 23051.8193858966. The cubic root of 531386377 is about 809.9722476901.

The spelling of 531386377 in words is "five hundred thirty-one million, three hundred eighty-six thousand, three hundred seventy-seven".