39980459 has 2 divisors, whose sum is σ = 39980460. Its totient is φ = 39980458.

The previous prime is 39980449. The next prime is 39980543. The reversal of 39980459 is 95408993.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39980459 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39980449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19990229 + 19990230.

It is an arithmetic number, because the mean of its divisors is an integer number (19990230).

Almost surely, 2^39980459 is an apocalyptic number.

39980459 is a deficient number, since it is larger than the sum of its proper divisors (1).

39980459 is an equidigital number, since it uses as much as digits as its factorization.

39980459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 39980459 is about 6323.0102799221. The cubic root of 39980459 is about 341.9394891974.

The spelling of 39980459 in words is "thirty-nine million, nine hundred eighty thousand, four hundred fifty-nine".