40313591 has 2 divisors, whose sum is σ = 40313592. Its totient is φ = 40313590.

The previous prime is 40313561. The next prime is 40313597. The reversal of 40313591 is 19531304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40313591 - 2²² = 36119287 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40313591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40313597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156795 + 20156796.

It is an arithmetic number, because the mean of its divisors is an integer number (20156796).

Almost surely, 2^40313591 is an apocalyptic number.

40313591 is a deficient number, since it is larger than the sum of its proper divisors (1).

40313591 is an equidigital number, since it uses as much as digits as its factorization.

40313591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 40313591 is about 6349.2984651850. The cubic root of 40313591 is about 342.8865857073.

Adding to 40313591 its reverse (19531304), we get a palindrome (59844895).

It can be divided in two parts, 40313 and 591, that added together give a palindrome (40904).

The spelling of 40313591 in words is "forty million, three hundred thirteen thousand, five hundred ninety-one".