2168749637 has 2 divisors, whose sum is σ = 2168749638. Its totient is φ = 2168749636.

The previous prime is 2168749621. The next prime is 2168749643. The reversal of 2168749637 is 7369478612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1634261476 + 534488161 = 40426^2 + 23119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168749637 - 2⁴ = 2168749621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2168749657) 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, 1084374818 + 1084374819.

It is an arithmetic number, because the mean of its divisors is an integer number (1084374819).

Almost surely, 2^2168749637 is an apocalyptic number.

It is an amenable number.

2168749637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168749637 is an equidigital number, since it uses as much as digits as its factorization.

2168749637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The square root of 2168749637 is about 46569.8361281205. The cubic root of 2168749637 is about 1294.4038812078.

The spelling of 2168749637 in words is "two billion, one hundred sixty-eight million, seven hundred forty-nine thousand, six hundred thirty-seven".