39974287 has 2 divisors, whose sum is σ = 39974288. Its totient is φ = 39974286.

The previous prime is 39974279. The next prime is 39974317. The reversal of 39974287 is 78247993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39974287 - 2³ = 39974279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39974287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39974227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19987143 + 19987144.

It is an arithmetic number, because the mean of its divisors is an integer number (19987144).

Almost surely, 2^39974287 is an apocalyptic number.

39974287 is a deficient number, since it is larger than the sum of its proper divisors (1).

39974287 is an equidigital number, since it uses as much as digits as its factorization.

39974287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 39974287 is about 6322.5222024126. The cubic root of 39974287 is about 341.9218926082.

The spelling of 39974287 in words is "thirty-nine million, nine hundred seventy-four thousand, two hundred eighty-seven".