9001139 has 4 divisors (see below), whose sum is σ = 10287024. Its totient is φ = 7715256.

The previous prime is 9001121. The next prime is 9001163. The reversal of 9001139 is 9311009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9001139 - 2¹⁶ = 8935603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9001169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642932 + ... + 642945.

It is an arithmetic number, because the mean of its divisors is an integer number (2571756).

Almost surely, 2^9001139 is an apocalyptic number.

9001139 is a deficient number, since it is larger than the sum of its proper divisors (1285885).

9001139 is a wasteful number, since it uses less digits than its factorization.

9001139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285884.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 9001139 is about 3000.1898273276. The cubic root of 9001139 is about 208.0171568072.

The spelling of 9001139 in words is "nine million, one thousand, one hundred thirty-nine".