10639991237 has 2 divisors, whose sum is σ = 10639991238. Its totient is φ = 10639991236.

The previous prime is 10639991231. The next prime is 10639991239. The reversal of 10639991237 is 73219993601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8361456481 + 2278534756 = 91441^2 + 47734^2 .

It is an emirp because it is prime and its reverse (73219993601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10639991237 - 2⁸ = 10639990981 is a prime.

It is a super-2 number, since 2×10639991237² (a number of 21 digits) contains 22 as substring.

Together with 10639991239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10639991231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319995618 + 5319995619.

It is an arithmetic number, because the mean of its divisors is an integer number (5319995619).

Almost surely, 2^10639991237 is an apocalyptic number.

It is an amenable number.

10639991237 is a deficient number, since it is larger than the sum of its proper divisors (1).

10639991237 is an equidigital number, since it uses as much as digits as its factorization.

10639991237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551124, while the sum is 50.

The spelling of 10639991237 in words is "ten billion, six hundred thirty-nine million, nine hundred ninety-one thousand, two hundred thirty-seven".