969569309 has 2 divisors, whose sum is σ = 969569310. Its totient is φ = 969569308.

The previous prime is 969569273. The next prime is 969569317. The reversal of 969569309 is 903965969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767844100 + 201725209 = 27710^2 + 14203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-969569309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (969569389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484784654 + 484784655.

It is an arithmetic number, because the mean of its divisors is an integer number (484784655).

Almost surely, 2^969569309 is an apocalyptic number.

It is an amenable number.

969569309 is a deficient number, since it is larger than the sum of its proper divisors (1).

969569309 is an equidigital number, since it uses as much as digits as its factorization.

969569309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3542940, while the sum is 56.

The square root of 969569309 is about 31137.9079098131. The cubic root of 969569309 is about 989.7517688698.

The spelling of 969569309 in words is "nine hundred sixty-nine million, five hundred sixty-nine thousand, three hundred nine".