8999939 has 16 divisors (see below), whose sum is σ = 10348800. Its totient is φ = 7757856.

The previous prime is 8999927. The next prime is 8999957. The reversal of 8999939 is 9399998.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8999939 - 2¹² = 8995843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8999339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20282 + ... + 20720.

It is an arithmetic number, because the mean of its divisors is an integer number (646800).

Almost surely, 2^8999939 is an apocalyptic number.

8999939 is a deficient number, since it is larger than the sum of its proper divisors (1348861).

8999939 is a wasteful number, since it uses less digits than its factorization.

8999939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

The product of its digits is 1417176, while the sum is 56.

The square root of 8999939 is about 2999.9898333161. The cubic root of 8999939 is about 208.0079123593.

The spelling of 8999939 in words is "eight million, nine hundred ninety-nine thousand, nine hundred thirty-nine".