531631637387 has 2 divisors, whose sum is σ = 531631637388. Its totient is φ = 531631637386.

The previous prime is 531631637359. The next prime is 531631637389. The reversal of 531631637387 is 783736136135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531631637387 - 2¹⁰ = 531631636363 is a prime.

Together with 531631637389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531631637389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265815818693 + 265815818694.

It is an arithmetic number, because the mean of its divisors is an integer number (265815818694).

Almost surely, 2^531631637387 is an apocalyptic number.

531631637387 is a deficient number, since it is larger than the sum of its proper divisors (1).

531631637387 is an equidigital number, since it uses as much as digits as its factorization.

531631637387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 53.

The spelling of 531631637387 in words is "five hundred thirty-one billion, six hundred thirty-one million, six hundred thirty-seven thousand, three hundred eighty-seven".