899919 has 6 divisors (see below), whose sum is σ = 1299896. Its totient is φ = 599940.

The previous prime is 899917. The next prime is 899939. The reversal of 899919 is 919998.

It is not a de Polignac number, because 899919 - 2¹ = 899917 is a prime.

It is a super-2 number, since 2×899919² = 1619708413122, 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 (899917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49987 + ... + 50004.

2⁸⁹⁹⁹¹⁹ is an apocalyptic number.

899919 is a deficient number, since it is larger than the sum of its proper divisors (399977).

899919 is a wasteful number, since it uses less digits than its factorization.

899919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99997 (or 99994 counting only the distinct ones).

The product of its digits is 52488, while the sum is 45.

The square root of 899919 is about 948.6406063415. The cubic root of 899919 is about 96.5460419055.

It can be divided in two parts, 89991 and 9, that added together give a square (90000 = 300²).

The spelling of 899919 in words is "eight hundred ninety-nine thousand, nine hundred nineteen".