630687919531 has 2 divisors, whose sum is σ = 630687919532. Its totient is φ = 630687919530.

The previous prime is 630687919529. The next prime is 630687919553. The reversal of 630687919531 is 135919786036.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630687919531 - 2¹ = 630687919529 is a prime.

It is a super-2 number, since 2×630687919531² (a number of 24 digits) contains 22 as substring.

Together with 630687919529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (630687919571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315343959765 + 315343959766.

It is an arithmetic number, because the mean of its divisors is an integer number (315343959766).

Almost surely, 2^630687919531 is an apocalyptic number.

630687919531 is a deficient number, since it is larger than the sum of its proper divisors (1).

630687919531 is an equidigital number, since it uses as much as digits as its factorization.

630687919531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 630687919531 in words is "six hundred thirty billion, six hundred eighty-seven million, nine hundred nineteen thousand, five hundred thirty-one".