8490139 has 4 divisors (see below), whose sum is σ = 9703024. Its totient is φ = 7277256.

The previous prime is 8490133. The next prime is 8490143. The reversal of 8490139 is 9310948.

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

It is not a de Polignac number, because 8490139 - 2⁵ = 8490107 is a prime.

It is a Duffinian number.

8490139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8490133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606432 + ... + 606445.

It is an arithmetic number, because the mean of its divisors is an integer number (2425756).

Almost surely, 2^8490139 is an apocalyptic number.

8490139 is a deficient number, since it is larger than the sum of its proper divisors (1212885).

8490139 is a wasteful number, since it uses less digits than its factorization.

8490139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212884.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 8490139 is about 2913.7843091073. The cubic root of 8490139 is about 204.0038045555.

The spelling of 8490139 in words is "eight million, four hundred ninety thousand, one hundred thirty-nine".