970578209 has 2 divisors, whose sum is σ = 970578210. Its totient is φ = 970578208.

The previous prime is 970578181. The next prime is 970578211. The reversal of 970578209 is 902875079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 944209984 + 26368225 = 30728^2 + 5135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-970578209 is a prime.

Together with 970578211, 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 (970571209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485289104 + 485289105.

It is an arithmetic number, because the mean of its divisors is an integer number (485289105).

Almost surely, 2^970578209 is an apocalyptic number.

It is an amenable number.

970578209 is a deficient number, since it is larger than the sum of its proper divisors (1).

970578209 is an equidigital number, since it uses as much as digits as its factorization.

970578209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 970578209 is about 31154.1042079531. The cubic root of 970578209 is about 990.0949502510.

The spelling of 970578209 in words is "nine hundred seventy million, five hundred seventy-eight thousand, two hundred nine".