8991939 has 16 divisors (see below), whose sum is σ = 13129344. Its totient is φ = 5428800.

The previous prime is 8991901. The next prime is 8991967. The reversal of 8991939 is 9391998.

It is not a de Polignac number, because 8991939 - 2¹⁷ = 8860867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8991989) 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, 16932 + ... + 17454.

It is an arithmetic number, because the mean of its divisors is an integer number (820584).

Almost surely, 2^8991939 is an apocalyptic number.

8991939 is a deficient number, since it is larger than the sum of its proper divisors (4137405).

8991939 is a wasteful number, since it uses less digits than its factorization.

8991939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its digits is 157464, while the sum is 48.

The square root of 8991939 is about 2998.6561990332. The cubic root of 8991939 is about 207.9462616969.

The spelling of 8991939 in words is "eight million, nine hundred ninety-one thousand, nine hundred thirty-nine".