630641069 has 2 divisors, whose sum is σ = 630641070. Its totient is φ = 630641068.

The previous prime is 630641023. The next prime is 630641083. The reversal of 630641069 is 960146036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530380900 + 100260169 = 23030^2 + 10013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630641069 is a prime.

It is a super-2 number, since 2×630641069² = 795416315818925522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630641969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315320534 + 315320535.

It is an arithmetic number, because the mean of its divisors is an integer number (315320535).

Almost surely, 2^630641069 is an apocalyptic number.

It is an amenable number.

630641069 is a deficient number, since it is larger than the sum of its proper divisors (1).

630641069 is an equidigital number, since it uses as much as digits as its factorization.

630641069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 630641069 is about 25112.5679491365. The cubic root of 630641069 is about 857.5525642737.

The spelling of 630641069 in words is "six hundred thirty million, six hundred forty-one thousand, sixty-nine".