40304839 has 2 divisors, whose sum is σ = 40304840. Its totient is φ = 40304838.

The previous prime is 40304837. The next prime is 40304851. The reversal of 40304839 is 93840304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40304839 - 2¹ = 40304837 is a prime.

Together with 40304837, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40304839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40304837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152419 + 20152420.

It is an arithmetic number, because the mean of its divisors is an integer number (20152420).

Almost surely, 2^40304839 is an apocalyptic number.

40304839 is a deficient number, since it is larger than the sum of its proper divisors (1).

40304839 is an equidigital number, since it uses as much as digits as its factorization.

40304839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40304839 is about 6348.6092177736. The cubic root of 40304839 is about 342.8617705807.

The spelling of 40304839 in words is "forty million, three hundred four thousand, eight hundred thirty-nine".