899040997 has 16 divisors (see below), whose sum is σ = 969759360. Its totient is φ = 831441600.

The previous prime is 899040983. The next prime is 899041009. The reversal of 899040997 is 799040998.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899040997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899047997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77347 + ... + 88207.

It is an arithmetic number, because the mean of its divisors is an integer number (60609960).

Almost surely, 2^899040997 is an apocalyptic number.

It is an amenable number.

899040997 is a deficient number, since it is larger than the sum of its proper divisors (70718363).

899040997 is a wasteful number, since it uses less digits than its factorization.

899040997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11004.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 899040997 is about 29984.0123565876. The cubic root of 899040997 is about 965.1463341313.

Subtracting from 899040997 its reverse (799040998), we obtain a palindrome (99999999).

The spelling of 899040997 in words is "eight hundred ninety-nine million, forty thousand, nine hundred ninety-seven".