899399 has 4 divisors (see below), whose sum is σ = 901320. Its totient is φ = 897480.

The previous prime is 899387. The next prime is 899401. The reversal of 899399 is 993998.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993998 = 2 ⋅496999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899399 is a prime.

It is a super-2 number, since 2×899399² = 1617837122402, 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 (899309) 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, 257 + ... + 1365.

It is an arithmetic number, because the mean of its divisors is an integer number (225330).

2⁸⁹⁹³⁹⁹ is an apocalyptic number.

899399 is a deficient number, since it is larger than the sum of its proper divisors (1921).

899399 is a wasteful number, since it uses less digits than its factorization.

899399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920.

The product of its digits is 157464, while the sum is 47.

The square root of 899399 is about 948.3664903401. The cubic root of 899399 is about 96.5274425965.

The spelling of 899399 in words is "eight hundred ninety-nine thousand, three hundred ninety-nine".