853651391 has 2 divisors, whose sum is σ = 853651392. Its totient is φ = 853651390.

The previous prime is 853651367. The next prime is 853651423. The reversal of 853651391 is 193156358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 853651391 - 2¹⁰ = 853650367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853651321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426825695 + 426825696.

It is an arithmetic number, because the mean of its divisors is an integer number (426825696).

Almost surely, 2^853651391 is an apocalyptic number.

853651391 is a deficient number, since it is larger than the sum of its proper divisors (1).

853651391 is an equidigital number, since it uses as much as digits as its factorization.

853651391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 853651391 is about 29217.3132063850. The cubic root of 853651391 is about 948.6227100161.

The spelling of 853651391 in words is "eight hundred fifty-three million, six hundred fifty-one thousand, three hundred ninety-one".