39958139 has 4 divisors (see below), whose sum is σ = 43031856. Its totient is φ = 36884424.

The previous prime is 39958133. The next prime is 39958147. The reversal of 39958139 is 93185993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93185993 = 17 ⋅5481529.

It is a cyclic number.

It is not a de Polignac number, because 39958139 - 2⁴ = 39958123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39958093 and 39958102.

It is not an unprimeable number, because it can be changed into a prime (39958133) 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, 1536839 + ... + 1536864.

It is an arithmetic number, because the mean of its divisors is an integer number (10757964).

Almost surely, 2^39958139 is an apocalyptic number.

39958139 is a deficient number, since it is larger than the sum of its proper divisors (3073717).

39958139 is a wasteful number, since it uses less digits than its factorization.

39958139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073716.

The product of its digits is 262440, while the sum is 47.

The square root of 39958139 is about 6321.2450514119. The cubic root of 39958139 is about 341.8758455217.

The spelling of 39958139 in words is "thirty-nine million, nine hundred fifty-eight thousand, one hundred thirty-nine".