7689639437 has 2 divisors, whose sum is σ = 7689639438. Its totient is φ = 7689639436.

The previous prime is 7689639383. The next prime is 7689639439. The reversal of 7689639437 is 7349369867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7678841641 + 10797796 = 87629^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 7689639437 - 2²⁸ = 7421203981 is a prime.

Together with 7689639439, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7689639437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7689639439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3844819718 + 3844819719.

It is an arithmetic number, because the mean of its divisors is an integer number (3844819719).

Almost surely, 2^7689639437 is an apocalyptic number.

It is an amenable number.

7689639437 is a deficient number, since it is larger than the sum of its proper divisors (1).

7689639437 is an equidigital number, since it uses as much as digits as its factorization.

7689639437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41150592, while the sum is 62.

The square root of 7689639437 is about 87690.5892157192. The cubic root of 7689639437 is about 1973.7947621305.

The spelling of 7689639437 in words is "seven billion, six hundred eighty-nine million, six hundred thirty-nine thousand, four hundred thirty-seven".