970569209 has 2 divisors, whose sum is σ = 970569210. Its totient is φ = 970569208.

The previous prime is 970569199. The next prime is 970569217. The reversal of 970569209 is 902965079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510895609 + 459673600 = 22603^2 + 21440^2 .

It is an emirp because it is prime and its reverse (902965079) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-970569209 is a prime.

It is not a weakly prime, because it can be changed into another prime (970569289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485284604 + 485284605.

It is an arithmetic number, because the mean of its divisors is an integer number (485284605).

Almost surely, 2^970569209 is an apocalyptic number.

It is an amenable number.

970569209 is a deficient number, since it is larger than the sum of its proper divisors (1).

970569209 is an equidigital number, since it uses as much as digits as its factorization.

970569209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 970569209 is about 31153.9597643702. The cubic root of 970569209 is about 990.0918899164.

The spelling of 970569209 in words is "nine hundred seventy million, five hundred sixty-nine thousand, two hundred nine".