853439999 has 2 divisors, whose sum is σ = 853440000. Its totient is φ = 853439998.

The previous prime is 853439971. The next prime is 853440067. The reversal of 853439999 is 999934358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 853439999 - 2¹² = 853435903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853439399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426719999 + 426720000.

It is an arithmetic number, because the mean of its divisors is an integer number (426720000).

Almost surely, 2^853439999 is an apocalyptic number.

853439999 is a deficient number, since it is larger than the sum of its proper divisors (1).

853439999 is an equidigital number, since it uses as much as digits as its factorization.

853439999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 59.

The square root of 853439999 is about 29213.6954013011. The cubic root of 853439999 is about 948.5444002170.

The spelling of 853439999 in words is "eight hundred fifty-three million, four hundred thirty-nine thousand, nine hundred ninety-nine".