40790591 has 2 divisors, whose sum is σ = 40790592. Its totient is φ = 40790590.

The previous prime is 40790579. The next prime is 40790593. The reversal of 40790591 is 19509704.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40790591 is a prime.

Together with 40790593, 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 (40790593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20395295 + 20395296.

It is an arithmetic number, because the mean of its divisors is an integer number (20395296).

Almost surely, 2^40790591 is an apocalyptic number.

40790591 is a deficient number, since it is larger than the sum of its proper divisors (1).

40790591 is an equidigital number, since it uses as much as digits as its factorization.

40790591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 40790591 is about 6386.7512085567. The cubic root of 40790591 is about 344.2336585200.

The spelling of 40790591 in words is "forty million, seven hundred ninety thousand, five hundred ninety-one".