3712631861 has 2 divisors, whose sum is σ = 3712631862. Its totient is φ = 3712631860.

The previous prime is 3712631851. The next prime is 3712631891. The reversal of 3712631861 is 1681362173.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2275767025 + 1436864836 = 47705^2 + 37906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3712631861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3712631851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1856315930 + 1856315931.

It is an arithmetic number, because the mean of its divisors is an integer number (1856315931).

Almost surely, 2^3712631861 is an apocalyptic number.

It is an amenable number.

3712631861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3712631861 is an equidigital number, since it uses as much as digits as its factorization.

3712631861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 3712631861 is about 60931.3700896345. The cubic root of 3712631861 is about 1548.4385052892.

The spelling of 3712631861 in words is "three billion, seven hundred twelve million, six hundred thirty-one thousand, eight hundred sixty-one".