7645972237 has 2 divisors, whose sum is σ = 7645972238. Its totient is φ = 7645972236.

The previous prime is 7645972211. The next prime is 7645972259. The reversal of 7645972237 is 7322795467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4935624516 + 2710347721 = 70254^2 + 52061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7645972237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7645975237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3822986118 + 3822986119.

It is an arithmetic number, because the mean of its divisors is an integer number (3822986119).

Almost surely, 2^7645972237 is an apocalyptic number.

It is an amenable number.

7645972237 is a deficient number, since it is larger than the sum of its proper divisors (1).

7645972237 is an equidigital number, since it uses as much as digits as its factorization.

7645972237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 52.

The square root of 7645972237 is about 87441.2502026361. The cubic root of 7645972237 is about 1970.0514675586.

The spelling of 7645972237 in words is "seven billion, six hundred forty-five million, nine hundred seventy-two thousand, two hundred thirty-seven".