40660439 has 2 divisors, whose sum is σ = 40660440. Its totient is φ = 40660438.

The previous prime is 40660427. The next prime is 40660453. The reversal of 40660439 is 93406604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40660439 - 2⁸ = 40660183 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40660469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20330219 + 20330220.

It is an arithmetic number, because the mean of its divisors is an integer number (20330220).

Almost surely, 2^40660439 is an apocalyptic number.

40660439 is a deficient number, since it is larger than the sum of its proper divisors (1).

40660439 is an equidigital number, since it uses as much as digits as its factorization.

40660439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 40660439 is about 6376.5538498471. The cubic root of 40660439 is about 343.8671488759.

The spelling of 40660439 in words is "forty million, six hundred sixty thousand, four hundred thirty-nine".