39197939 has 8 divisors (see below), whose sum is σ = 43046400. Its totient is φ = 35397000.

The previous prime is 39197891. The next prime is 39197941. The reversal of 39197939 is 93979193.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39197939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39197239) 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, 10139 + ... + 13460.

It is an arithmetic number, because the mean of its divisors is an integer number (5380800).

Almost surely, 2^39197939 is an apocalyptic number.

39197939 is a deficient number, since it is larger than the sum of its proper divisors (3848461).

39197939 is a wasteful number, since it uses less digits than its factorization.

39197939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23761.

The product of its digits is 413343, while the sum is 50.

The square root of 39197939 is about 6260.8257442609. The cubic root of 39197939 is about 339.6938969308.

The spelling of 39197939 in words is "thirty-nine million, one hundred ninety-seven thousand, nine hundred thirty-nine".