970891001 has 2 divisors, whose sum is σ = 970891002. Its totient is φ = 970891000.

The previous prime is 970890979. The next prime is 970891007. The reversal of 970891001 is 100198079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869365225 + 101525776 = 29485^2 + 10076^2 .

It is an emirp because it is prime and its reverse (100198079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 970891001 - 2²² = 966696697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (970891007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485445500 + 485445501.

It is an arithmetic number, because the mean of its divisors is an integer number (485445501).

Almost surely, 2^970891001 is an apocalyptic number.

It is an amenable number.

970891001 is a deficient number, since it is larger than the sum of its proper divisors (1).

970891001 is an equidigital number, since it uses as much as digits as its factorization.

970891001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 970891001 is about 31159.1238804945. The cubic root of 970891001 is about 990.2012994059.

The spelling of 970891001 in words is "nine hundred seventy million, eight hundred ninety-one thousand, one".