632717861 has 2 divisors, whose sum is σ = 632717862. Its totient is φ = 632717860.

The previous prime is 632717831. The next prime is 632717927. The reversal of 632717861 is 168717236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325802500 + 306915361 = 18050^2 + 17519^2 .

It is a cyclic number.

It is not a de Polignac number, because 632717861 - 2²² = 628523557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (632717831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316358930 + 316358931.

It is an arithmetic number, because the mean of its divisors is an integer number (316358931).

Almost surely, 2^632717861 is an apocalyptic number.

It is an amenable number.

632717861 is a deficient number, since it is larger than the sum of its proper divisors (1).

632717861 is an equidigital number, since it uses as much as digits as its factorization.

632717861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 632717861 is about 25153.8836166505. The cubic root of 632717861 is about 858.4928809225.

The spelling of 632717861 in words is "six hundred thirty-two million, seven hundred seventeen thousand, eight hundred sixty-one".