1369657657 has 2 divisors, whose sum is σ = 1369657658. Its totient is φ = 1369657656.

The previous prime is 1369657651. The next prime is 1369657661. The reversal of 1369657657 is 7567569631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1006412176 + 363245481 = 31724^2 + 19059^2 .

It is an emirp because it is prime and its reverse (7567569631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1369657657 - 2⁷ = 1369657529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1369657598 and 1369657607.

It is not a weakly prime, because it can be changed into another prime (1369657651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684828828 + 684828829.

It is an arithmetic number, because the mean of its divisors is an integer number (684828829).

Almost surely, 2^1369657657 is an apocalyptic number.

It is an amenable number.

1369657657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369657657 is an equidigital number, since it uses as much as digits as its factorization.

1369657657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 55.

The square root of 1369657657 is about 37008.8861896707. The cubic root of 1369657657 is about 1110.5480228174.

The spelling of 1369657657 in words is "one billion, three hundred sixty-nine million, six hundred fifty-seven thousand, six hundred fifty-seven".