899861 has 8 divisors (see below), whose sum is σ = 975744. Its totient is φ = 826560.

The previous prime is 899851. The next prime is 899863. The reversal of 899861 is 168998.

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 899861 - 2¹⁸ = 637717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 899861.

It is not an unprimeable number, because it can be changed into a prime (899863) 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, 116 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

2⁸⁹⁹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

899861 is a deficient number, since it is larger than the sum of its proper divisors (75883).

899861 is a wasteful number, since it uses less digits than its factorization.

899861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its digits is 31104, while the sum is 41.

The square root of 899861 is about 948.6100357892. The cubic root of 899861 is about 96.5439677223.

The spelling of 899861 in words is "eight hundred ninety-nine thousand, eight hundred sixty-one".