852491999 has 2 divisors, whose sum is σ = 852492000. Its totient is φ = 852491998.

The previous prime is 852491993. The next prime is 852492007. The reversal of 852491999 is 999194258.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-852491999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (852491993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426245999 + 426246000.

It is an arithmetic number, because the mean of its divisors is an integer number (426246000).

Almost surely, 2^852491999 is an apocalyptic number.

852491999 is a deficient number, since it is larger than the sum of its proper divisors (1).

852491999 is an equidigital number, since it uses as much as digits as its factorization.

852491999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 56.

The square root of 852491999 is about 29197.4656263176. The cubic root of 852491999 is about 948.1930561471.

The spelling of 852491999 in words is "eight hundred fifty-two million, four hundred ninety-one thousand, nine hundred ninety-nine".