899144391 has 32 divisors (see below), whose sum is σ = 1337414400. Its totient is φ = 534885120.

The previous prime is 899144381. The next prime is 899144401. The reversal of 899144391 is 193441998.

It is an interprime number because it is at equal distance from previous prime (899144381) and next prime (899144401).

It is not a de Polignac number, because 899144391 - 2⁶ = 899144327 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 899144391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899144321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61140 + ... + 74406.

It is an arithmetic number, because the mean of its divisors is an integer number (41794200).

Almost surely, 2^899144391 is an apocalyptic number.

899144391 is a deficient number, since it is larger than the sum of its proper divisors (438270009).

899144391 is a wasteful number, since it uses less digits than its factorization.

899144391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13359.

The product of its digits is 279936, while the sum is 48.

The square root of 899144391 is about 29985.7364591901. The cubic root of 899144391 is about 965.1833315227.

The spelling of 899144391 in words is "eight hundred ninety-nine million, one hundred forty-four thousand, three hundred ninety-one".