899531647 has 8 divisors (see below), whose sum is σ = 1028276352. Its totient is φ = 770847000.

The previous prime is 899531629. The next prime is 899531671. The reversal of 899531647 is 746135998.

It is a happy number.

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

It is not a de Polignac number, because 899531647 - 2⁷ = 899531519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 899531594 and 899531603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899531617) 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, 23772 + ... + 48622.

It is an arithmetic number, because the mean of its divisors is an integer number (128534544).

Almost surely, 2^899531647 is an apocalyptic number.

899531647 is a deficient number, since it is larger than the sum of its proper divisors (128744705).

899531647 is a wasteful number, since it uses less digits than its factorization.

899531647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30029.

The product of its digits is 1632960, while the sum is 52.

The square root of 899531647 is about 29992.1931008721. The cubic root of 899531647 is about 965.3218778237.

The spelling of 899531647 in words is "eight hundred ninety-nine million, five hundred thirty-one thousand, six hundred forty-seven".