3900139 has 4 divisors (see below), whose sum is σ = 3905424. Its totient is φ = 3894856.

The previous prime is 3900131. The next prime is 3900167. The reversal of 3900139 is 9310093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9310093 = 13 ⋅716161.

It is a cyclic number.

It is not a de Polignac number, because 3900139 - 2³ = 3900131 is a prime.

It is a super-2 number, since 2×3900139² = 30422168438642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3900131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312 + ... + 3085.

It is an arithmetic number, because the mean of its divisors is an integer number (976356).

Almost surely, 2^3900139 is an apocalyptic number.

3900139 is a deficient number, since it is larger than the sum of its proper divisors (5285).

3900139 is an equidigital number, since it uses as much as digits as its factorization.

3900139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 3900139 is about 1974.8769581926. The cubic root of 3900139 is about 157.4079616791.

The spelling of 3900139 in words is "three million, nine hundred thousand, one hundred thirty-nine".