853971901 has 2 divisors, whose sum is σ = 853971902. Its totient is φ = 853971900.

The previous prime is 853971889. The next prime is 853971907. The reversal of 853971901 is 109179358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577248676 + 276723225 = 24026^2 + 16635^2 .

It is a cyclic number.

It is not a de Polignac number, because 853971901 - 2⁷ = 853971773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853971907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426985950 + 426985951.

It is an arithmetic number, because the mean of its divisors is an integer number (426985951).

Almost surely, 2^853971901 is an apocalyptic number.

It is an amenable number.

853971901 is a deficient number, since it is larger than the sum of its proper divisors (1).

853971901 is an equidigital number, since it uses as much as digits as its factorization.

853971901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 853971901 is about 29222.7976244575. The cubic root of 853971901 is about 948.7414177322.

The spelling of 853971901 in words is "eight hundred fifty-three million, nine hundred seventy-one thousand, nine hundred one".