853492994381 has 2 divisors, whose sum is σ = 853492994382. Its totient is φ = 853492994380.

The previous prime is 853492994323. The next prime is 853492994383. The reversal of 853492994381 is 183499294358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664780946281 + 188712048100 = 815341^2 + 434410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853492994381 is a prime.

It is a super-2 number, since 2×853492994381² (a number of 25 digits) contains 22 as substring.

Together with 853492994383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853492994383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426746497190 + 426746497191.

It is an arithmetic number, because the mean of its divisors is an integer number (426746497191).

Almost surely, 2^853492994381 is an apocalyptic number.

It is an amenable number.

853492994381 is a deficient number, since it is larger than the sum of its proper divisors (1).

853492994381 is an equidigital number, since it uses as much as digits as its factorization.

853492994381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 65.

The spelling of 853492994381 in words is "eight hundred fifty-three billion, four hundred ninety-two million, nine hundred ninety-four thousand, three hundred eighty-one".