970577221 has 2 divisors, whose sum is σ = 970577222. Its totient is φ = 970577220.

The previous prime is 970577219. The next prime is 970577239. The reversal of 970577221 is 122775079.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 933974721 + 36602500 = 30561^2 + 6050^2 .

It is a cyclic number.

It is not a de Polignac number, because 970577221 - 2¹ = 970577219 is a prime.

Together with 970577219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (970577281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485288610 + 485288611.

It is an arithmetic number, because the mean of its divisors is an integer number (485288611).

Almost surely, 2^970577221 is an apocalyptic number.

It is an amenable number.

970577221 is a deficient number, since it is larger than the sum of its proper divisors (1).

970577221 is an equidigital number, since it uses as much as digits as its factorization.

970577221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 970577221 is about 31154.0883512903. The cubic root of 970577221 is about 990.0946142952.

The spelling of 970577221 in words is "nine hundred seventy million, five hundred seventy-seven thousand, two hundred twenty-one".