899453239 has 4 divisors (see below), whose sum is σ = 923762824. Its totient is φ = 875143656.

The previous prime is 899453237. The next prime is 899453257. The reversal of 899453239 is 932354998.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 899453239 - 2¹ = 899453237 is a prime.

It is a super-2 number, since 2×899453239² = 1618032258295182242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899453237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12154737 + ... + 12154810.

It is an arithmetic number, because the mean of its divisors is an integer number (230940706).

Almost surely, 2^899453239 is an apocalyptic number.

899453239 is a deficient number, since it is larger than the sum of its proper divisors (24309585).

899453239 is a wasteful number, since it uses less digits than its factorization.

899453239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24309584.

The product of its digits is 2099520, while the sum is 52.

The square root of 899453239 is about 29990.8859322295. The cubic root of 899453239 is about 965.2938294657.

The spelling of 899453239 in words is "eight hundred ninety-nine million, four hundred fifty-three thousand, two hundred thirty-nine".