899381 has 4 divisors (see below), whose sum is σ = 1027872. Its totient is φ = 770892.

The previous prime is 899321. The next prime is 899387. The reversal of 899381 is 183998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899381 is a prime.

It is a super-2 number, since 2×899381² = 1617772366322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899387) 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, 64235 + ... + 64248.

It is an arithmetic number, because the mean of its divisors is an integer number (256968).

2⁸⁹⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

899381 is a deficient number, since it is larger than the sum of its proper divisors (128491).

899381 is a wasteful number, since it uses less digits than its factorization.

899381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128490.

The product of its digits is 15552, while the sum is 38.

The square root of 899381 is about 948.3570002905. The cubic root of 899381 is about 96.5267986459.

The spelling of 899381 in words is "eight hundred ninety-nine thousand, three hundred eighty-one".