7699971397 has 2 divisors, whose sum is σ = 7699971398. Its totient is φ = 7699971396.

The previous prime is 7699971373. The next prime is 7699971439. The reversal of 7699971397 is 7931799967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7627227556 + 72743841 = 87334^2 + 8529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7699971397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7699971997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3849985698 + 3849985699.

It is an arithmetic number, because the mean of its divisors is an integer number (3849985699).

Almost surely, 2^7699971397 is an apocalyptic number.

It is an amenable number.

7699971397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7699971397 is an equidigital number, since it uses as much as digits as its factorization.

7699971397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40507614, while the sum is 67.

The square root of 7699971397 is about 87749.4808930514. The cubic root of 7699971397 is about 1974.6783771100.

The spelling of 7699971397 in words is "seven billion, six hundred ninety-nine million, nine hundred seventy-one thousand, three hundred ninety-seven".