630644071 has 2 divisors, whose sum is σ = 630644072. Its totient is φ = 630644070.

The previous prime is 630644057. The next prime is 630644089. The reversal of 630644071 is 170446036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630644071 - 2¹³ = 630635879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630647071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315322035 + 315322036.

It is an arithmetic number, because the mean of its divisors is an integer number (315322036).

Almost surely, 2^630644071 is an apocalyptic number.

630644071 is a deficient number, since it is larger than the sum of its proper divisors (1).

630644071 is an equidigital number, since it uses as much as digits as its factorization.

630644071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 630644071 is about 25112.6277199340. The cubic root of 630644071 is about 857.5539249890.

The spelling of 630644071 in words is "six hundred thirty million, six hundred forty-four thousand, seventy-one".