853157909 has 2 divisors, whose sum is σ = 853157910. Its totient is φ = 853157908.

The previous prime is 853157897. The next prime is 853157911. The reversal of 853157909 is 909751358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618914884 + 234243025 = 24878^2 + 15305^2 .

It is a cyclic number.

It is not a de Polignac number, because 853157909 - 2²⁰ = 852109333 is a prime.

Together with 853157911, 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 (853157509) 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, 426578954 + 426578955.

It is an arithmetic number, because the mean of its divisors is an integer number (426578955).

Almost surely, 2^853157909 is an apocalyptic number.

It is an amenable number.

853157909 is a deficient number, since it is larger than the sum of its proper divisors (1).

853157909 is an equidigital number, since it uses as much as digits as its factorization.

853157909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 853157909 is about 29208.8669585111. The cubic root of 853157909 is about 948.4398803225.

The spelling of 853157909 in words is "eight hundred fifty-three million, one hundred fifty-seven thousand, nine hundred nine".