630134623 has 2 divisors, whose sum is σ = 630134624. Its totient is φ = 630134622.

The previous prime is 630134567. The next prime is 630134653. The reversal of 630134623 is 326431036.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 630134623 - 2⁹ = 630134111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 630134591 and 630134600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630134653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315067311 + 315067312.

It is an arithmetic number, because the mean of its divisors is an integer number (315067312).

Almost surely, 2^630134623 is an apocalyptic number.

630134623 is a deficient number, since it is larger than the sum of its proper divisors (1).

630134623 is an equidigital number, since it uses as much as digits as its factorization.

630134623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 630134623 is about 25102.4824071246. The cubic root of 630134623 is about 857.3229458757.

Adding to 630134623 its reverse (326431036), we get a palindrome (956565659).

The spelling of 630134623 in words is "six hundred thirty million, one hundred thirty-four thousand, six hundred twenty-three".