3990254309 has 2 divisors, whose sum is σ = 3990254310. Its totient is φ = 3990254308.

The previous prime is 3990254293. The next prime is 3990254329. The reversal of 3990254309 is 9034520993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2364390625 + 1625863684 = 48625^2 + 40322^2 .

It is an emirp because it is prime and its reverse (9034520993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3990254309 - 2⁴ = 3990254293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3990254309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3990254329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995127154 + 1995127155.

It is an arithmetic number, because the mean of its divisors is an integer number (1995127155).

Almost surely, 2^3990254309 is an apocalyptic number.

It is an amenable number.

3990254309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990254309 is an equidigital number, since it uses as much as digits as its factorization.

3990254309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 3990254309 is about 63168.4597643476. The cubic root of 3990254309 is about 1586.1108101966.

The spelling of 3990254309 in words is "three billion, nine hundred ninety million, two hundred fifty-four thousand, three hundred nine".