7637634997 has 2 divisors, whose sum is σ = 7637634998. Its totient is φ = 7637634996.

The previous prime is 7637634971. The next prime is 7637635039. The reversal of 7637634997 is 7994367367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7339520241 + 298114756 = 85671^2 + 17266^2 .

It is a cyclic number.

It is not a de Polignac number, because 7637634997 - 2¹¹ = 7637632949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7637632997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3818817498 + 3818817499.

It is an arithmetic number, because the mean of its divisors is an integer number (3818817499).

Almost surely, 2^7637634997 is an apocalyptic number.

It is an amenable number.

7637634997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7637634997 is an equidigital number, since it uses as much as digits as its factorization.

7637634997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36006768, while the sum is 61.

The square root of 7637634997 is about 87393.5638190822. The cubic root of 7637634997 is about 1969.3351529238.

The spelling of 7637634997 in words is "seven billion, six hundred thirty-seven million, six hundred thirty-four thousand, nine hundred ninety-seven".