39018197 has 4 divisors (see below), whose sum is σ = 39134316. Its totient is φ = 38902080.

The previous prime is 39018193. The next prime is 39018209. The reversal of 39018197 is 79181093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79181093 = 5519 ⋅14347.

It can be written as a sum of positive squares in 2 ways, for example, as 22648081 + 16370116 = 4759^2 + 4046^2 .

It is a cyclic number.

It is not a de Polignac number, because 39018197 - 2² = 39018193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39018197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39018193) 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, 57554 + ... + 58227.

It is an arithmetic number, because the mean of its divisors is an integer number (9783579).

Almost surely, 2^39018197 is an apocalyptic number.

It is an amenable number.

39018197 is a deficient number, since it is larger than the sum of its proper divisors (116119).

39018197 is a wasteful number, since it uses less digits than its factorization.

39018197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116118.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 39018197 is about 6246.4547544987. The cubic root of 39018197 is about 339.1738795829.

The spelling of 39018197 in words is "thirty-nine million, eighteen thousand, one hundred ninety-seven".