899949659 has 4 divisors (see below), whose sum is σ = 1028513904. Its totient is φ = 771385416.

The previous prime is 899949647. The next prime is 899949667. The reversal of 899949659 is 956949998.

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 899949659 - 2⁴ = 899949643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899949059) 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, 64282112 + ... + 64282125.

It is an arithmetic number, because the mean of its divisors is an integer number (257128476).

Almost surely, 2^899949659 is an apocalyptic number.

899949659 is a deficient number, since it is larger than the sum of its proper divisors (128564245).

899949659 is a wasteful number, since it uses less digits than its factorization.

899949659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128564244.

The product of its digits is 56687040, while the sum is 68.

The square root of 899949659 is about 29999.1609716005. The cubic root of 899949659 is about 965.4713828992.

The spelling of 899949659 in words is "eight hundred ninety-nine million, nine hundred forty-nine thousand, six hundred fifty-nine".