971001901 has 2 divisors, whose sum is σ = 971001902. Its totient is φ = 971001900.

The previous prime is 971001887. The next prime is 971001917. The reversal of 971001901 is 109100179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905408100 + 65593801 = 30090^2 + 8099^2 .

It is a cyclic number.

It is not a de Polignac number, because 971001901 - 2⁹ = 971001389 is a prime.

It is a super-2 number, since 2×971001901² = 1885689383491227602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 971001901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971001931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485500950 + 485500951.

It is an arithmetic number, because the mean of its divisors is an integer number (485500951).

Almost surely, 2^971001901 is an apocalyptic number.

It is an amenable number.

971001901 is a deficient number, since it is larger than the sum of its proper divisors (1).

971001901 is an equidigital number, since it uses as much as digits as its factorization.

971001901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 971001901 is about 31160.9034047474. The cubic root of 971001901 is about 990.2389998766.

The spelling of 971001901 in words is "nine hundred seventy-one million, one thousand, nine hundred one".