970216321 has 2 divisors, whose sum is σ = 970216322. Its totient is φ = 970216320.

The previous prime is 970216319. The next prime is 970216381. The reversal of 970216321 is 123612079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 769285696 + 200930625 = 27736^2 + 14175^2 .

It is a cyclic number.

It is not a de Polignac number, because 970216321 - 2¹ = 970216319 is a prime.

Together with 970216319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (970216381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485108160 + 485108161.

It is an arithmetic number, because the mean of its divisors is an integer number (485108161).

Almost surely, 2^970216321 is an apocalyptic number.

It is an amenable number.

970216321 is a deficient number, since it is larger than the sum of its proper divisors (1).

970216321 is an equidigital number, since it uses as much as digits as its factorization.

970216321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 970216321 is about 31148.2956355560. The cubic root of 970216321 is about 989.9718799618.

The spelling of 970216321 in words is "nine hundred seventy million, two hundred sixteen thousand, three hundred twenty-one".