630423253 has 2 divisors, whose sum is σ = 630423254. Its totient is φ = 630423252.

The previous prime is 630423251. The next prime is 630423259. The reversal of 630423253 is 352324036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 566535204 + 63888049 = 23802^2 + 7993^2 .

It is a cyclic number.

It is not a de Polignac number, because 630423253 - 2¹ = 630423251 is a prime.

Together with 630423251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630423251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315211626 + 315211627.

It is an arithmetic number, because the mean of its divisors is an integer number (315211627).

Almost surely, 2^630423253 is an apocalyptic number.

It is an amenable number.

630423253 is a deficient number, since it is larger than the sum of its proper divisors (1).

630423253 is an equidigital number, since it uses as much as digits as its factorization.

630423253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 630423253 is about 25108.2307819567. The cubic root of 630423253 is about 857.4538233853.

Adding to 630423253 its reverse (352324036), we get a palindrome (982747289).

The spelling of 630423253 in words is "six hundred thirty million, four hundred twenty-three thousand, two hundred fifty-three".