39974189 has 2 divisors, whose sum is σ = 39974190. Its totient is φ = 39974188.

The previous prime is 39974183. The next prime is 39974201. The reversal of 39974189 is 98147993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22250089 + 17724100 = 4717^2 + 4210^2 .

It is an emirp because it is prime and its reverse (98147993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39974189 - 2⁴ = 39974173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39974183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19987094 + 19987095.

It is an arithmetic number, because the mean of its divisors is an integer number (19987095).

Almost surely, 2^39974189 is an apocalyptic number.

It is an amenable number.

39974189 is a deficient number, since it is larger than the sum of its proper divisors (1).

39974189 is an equidigital number, since it uses as much as digits as its factorization.

39974189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 39974189 is about 6322.5144523362. The cubic root of 39974189 is about 341.9216131922.

The spelling of 39974189 in words is "thirty-nine million, nine hundred seventy-four thousand, one hundred eighty-nine".