630823877 has 2 divisors, whose sum is σ = 630823878. Its totient is φ = 630823876.

The previous prime is 630823873. The next prime is 630823891. The reversal of 630823877 is 778328036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388523521 + 242300356 = 19711^2 + 15566^2 .

It is a cyclic number.

It is not a de Polignac number, because 630823877 - 2² = 630823873 is a prime.

It is a super-2 number, since 2×630823877² = 795877527586622258, which contains 22 as substring.

It is equal to p_32847875 and since 630823877 and 32847875 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630823871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315411938 + 315411939.

It is an arithmetic number, because the mean of its divisors is an integer number (315411939).

Almost surely, 2^630823877 is an apocalyptic number.

It is an amenable number.

630823877 is a deficient number, since it is larger than the sum of its proper divisors (1).

630823877 is an equidigital number, since it uses as much as digits as its factorization.

630823877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 630823877 is about 25116.2074565409. The cubic root of 630823877 is about 857.6354177021.

The spelling of 630823877 in words is "six hundred thirty million, eight hundred twenty-three thousand, eight hundred seventy-seven".