3930139 has 2 divisors, whose sum is σ = 3930140. Its totient is φ = 3930138.

The previous prime is 3930061. The next prime is 3930191. The reversal of 3930139 is 9310393.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9310393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3930139 - 2¹¹ = 3928091 is a prime.

It is not a weakly prime, because it can be changed into another prime (3930439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965069 + 1965070.

It is an arithmetic number, because the mean of its divisors is an integer number (1965070).

Almost surely, 2^3930139 is an apocalyptic number.

3930139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3930139 is an equidigital number, since it uses as much as digits as its factorization.

3930139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 3930139 is about 1982.4578179623. The cubic root of 3930139 is about 157.8105270282.

It can be divided in two parts, 39301 and 39, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 3930139 in words is "three million, nine hundred thirty thousand, one hundred thirty-nine".