40080839 has 2 divisors, whose sum is σ = 40080840. Its totient is φ = 40080838.

The previous prime is 40080827. The next prime is 40080841. The reversal of 40080839 is 93808004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40080839 is a prime.

Together with 40080841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40089839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20040419 + 20040420.

It is an arithmetic number, because the mean of its divisors is an integer number (20040420).

Almost surely, 2^40080839 is an apocalyptic number.

40080839 is a deficient number, since it is larger than the sum of its proper divisors (1).

40080839 is an equidigital number, since it uses as much as digits as its factorization.

40080839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40080839 is about 6330.9429787355. The cubic root of 40080839 is about 342.2254222159.

The spelling of 40080839 in words is "forty million, eighty thousand, eight hundred thirty-nine".