1356788969 has 2 divisors, whose sum is σ = 1356788970. Its totient is φ = 1356788968.

The previous prime is 1356788963. The next prime is 1356788971. The reversal of 1356788969 is 9698876531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972628969 + 384160000 = 31187^2 + 19600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1356788969 is a prime.

It is a super-2 number, since 2×1356788969² = 3681752612800165922, which contains 22 as substring.

Together with 1356788971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1356788963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678394484 + 678394485.

It is an arithmetic number, because the mean of its divisors is an integer number (678394485).

Almost surely, 2^1356788969 is an apocalyptic number.

It is an amenable number.

1356788969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356788969 is an equidigital number, since it uses as much as digits as its factorization.

1356788969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 62.

The square root of 1356788969 is about 36834.6164497474. The cubic root of 1356788969 is about 1107.0590027107.

The spelling of 1356788969 in words is "one billion, three hundred fifty-six million, seven hundred eighty-eight thousand, nine hundred sixty-nine".