899478239 has 8 divisors (see below), whose sum is σ = 1015085520. Its totient is φ = 789510400.

The previous prime is 899478191. The next prime is 899478247. The reversal of 899478239 is 932874998.

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 899478239 - 2⁸ = 899477983 is a prime.

It is a super-2 number, since 2×899478239² = 1618122204869082242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899478269) 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, 1409522 + ... + 1410159.

It is an arithmetic number, because the mean of its divisors is an integer number (126885690).

Almost surely, 2^899478239 is an apocalyptic number.

899478239 is a deficient number, since it is larger than the sum of its proper divisors (115607281).

899478239 is a wasteful number, since it uses less digits than its factorization.

899478239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819721.

The product of its digits is 7838208, while the sum is 59.

The square root of 899478239 is about 29991.3027226228. The cubic root of 899478239 is about 965.3027727219.

The spelling of 899478239 in words is "eight hundred ninety-nine million, four hundred seventy-eight thousand, two hundred thirty-nine".