8919139 has 2 divisors, whose sum is σ = 8919140. Its totient is φ = 8919138.

The previous prime is 8919133. The next prime is 8919149. The reversal of 8919139 is 9319198.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8919139 - 2⁷ = 8919011 is a prime.

It is not a weakly prime, because it can be changed into another prime (8919133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4459569 + 4459570.

It is an arithmetic number, because the mean of its divisors is an integer number (4459570).

Almost surely, 2^8919139 is an apocalyptic number.

8919139 is a deficient number, since it is larger than the sum of its proper divisors (1).

8919139 is an equidigital number, since it uses as much as digits as its factorization.

8919139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 40.

The square root of 8919139 is about 2986.4927590738. The cubic root of 8919139 is about 207.3835529920.

The spelling of 8919139 in words is "eight million, nine hundred nineteen thousand, one hundred thirty-nine".