899043243 has 32 divisors (see below), whose sum is σ = 1384857600. Its totient is φ = 508186656.

The previous prime is 899043241. The next prime is 899043259. The reversal of 899043243 is 342340998.

It is a happy number.

It is not a de Polignac number, because 899043243 - 2¹ = 899043241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 899043195 and 899043204.

It is not an unprimeable number, because it can be changed into a prime (899043241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1397880 + ... + 1398522.

It is an arithmetic number, because the mean of its divisors is an integer number (43276800).

Almost surely, 2^899043243 is an apocalyptic number.

899043243 is a deficient number, since it is larger than the sum of its proper divisors (485814357).

899043243 is a wasteful number, since it uses less digits than its factorization.

899043243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 899043243 is about 29984.0498098572. The cubic root of 899043243 is about 965.1471378458.

The spelling of 899043243 in words is "eight hundred ninety-nine million, forty-three thousand, two hundred forty-three".