39290491 has 2 divisors, whose sum is σ = 39290492. Its totient is φ = 39290490.

The previous prime is 39290479. The next prime is 39290497. The reversal of 39290491 is 19409293.

It is a strong prime.

It is an emirp because it is prime and its reverse (19409293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39290491 - 2¹¹ = 39288443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39290491.

It is not a weakly prime, because it can be changed into another prime (39290497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19645245 + 19645246.

It is an arithmetic number, because the mean of its divisors is an integer number (19645246).

Almost surely, 2^39290491 is an apocalyptic number.

39290491 is a deficient number, since it is larger than the sum of its proper divisors (1).

39290491 is an equidigital number, since it uses as much as digits as its factorization.

39290491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 39290491 is about 6268.2127436774. The cubic root of 39290491 is about 339.9610422491.

The spelling of 39290491 in words is "thirty-nine million, two hundred ninety thousand, four hundred ninety-one".