899138563 has 8 divisors (see below), whose sum is σ = 944532000. Its totient is φ = 854270208.

The previous prime is 899138561. The next prime is 899138567. The reversal of 899138563 is 365831998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 899138563 - 2¹ = 899138561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 899138563.

It is not an unprimeable number, because it can be changed into a prime (899138561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127758 + ... + 134611.

It is an arithmetic number, because the mean of its divisors is an integer number (118066500).

Almost surely, 2^899138563 is an apocalyptic number.

899138563 is a deficient number, since it is larger than the sum of its proper divisors (45393437).

899138563 is a wasteful number, since it uses less digits than its factorization.

899138563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262541.

The product of its digits is 1399680, while the sum is 52.

The square root of 899138563 is about 29985.6392794951. The cubic root of 899138563 is about 965.1812461696.

The spelling of 899138563 in words is "eight hundred ninety-nine million, one hundred thirty-eight thousand, five hundred sixty-three".