39143939 has 8 divisors (see below), whose sum is σ = 40770000. Its totient is φ = 37536352.

The previous prime is 39143887. The next prime is 39143959. The reversal of 39143939 is 93934193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39143939 - 2⁸ = 39143683 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 39143896 and 39143905.

It is not an unprimeable number, because it can be changed into a prime (39143959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209 + ... + 8850.

It is an arithmetic number, because the mean of its divisors is an integer number (5096250).

Almost surely, 2^39143939 is an apocalyptic number.

39143939 is a deficient number, since it is larger than the sum of its proper divisors (1626061).

39143939 is a wasteful number, since it uses less digits than its factorization.

39143939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9237.

The product of its digits is 78732, while the sum is 41.

The square root of 39143939 is about 6256.5117277921. The cubic root of 39143939 is about 339.5378351512.

The spelling of 39143939 in words is "thirty-nine million, one hundred forty-three thousand, nine hundred thirty-nine".