630653531 has 2 divisors, whose sum is σ = 630653532. Its totient is φ = 630653530.

The previous prime is 630653521. The next prime is 630653561. The reversal of 630653531 is 135356036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630653531 - 2⁶ = 630653467 is a prime.

It is a super-2 number, since 2×630653531² = 795447752325535922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_32839520 and since 630653531 and 32839520 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (630653501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315326765 + 315326766.

It is an arithmetic number, because the mean of its divisors is an integer number (315326766).

Almost surely, 2^630653531 is an apocalyptic number.

630653531 is a deficient number, since it is larger than the sum of its proper divisors (1).

630653531 is an equidigital number, since it uses as much as digits as its factorization.

630653531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 32.

The square root of 630653531 is about 25112.8160706839. The cubic root of 630653531 is about 857.5582128908.

The spelling of 630653531 in words is "six hundred thirty million, six hundred fifty-three thousand, five hundred thirty-one".