40409113 has 2 divisors, whose sum is σ = 40409114. Its totient is φ = 40409112.

The previous prime is 40409101. The next prime is 40409123. The reversal of 40409113 is 31190404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31002624 + 9406489 = 5568^2 + 3067^2 .

It is a cyclic number.

It is not a de Polignac number, because 40409113 - 2¹⁷ = 40278041 is a prime.

It is not a weakly prime, because it can be changed into another prime (40409123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20204556 + 20204557.

It is an arithmetic number, because the mean of its divisors is an integer number (20204557).

Almost surely, 2^40409113 is an apocalyptic number.

It is an amenable number.

40409113 is a deficient number, since it is larger than the sum of its proper divisors (1).

40409113 is an equidigital number, since it uses as much as digits as its factorization.

40409113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 40409113 is about 6356.8162628788. The cubic root of 40409113 is about 343.1571923550.

Adding to 40409113 its reverse (31190404), we get a palindrome (71599517).

The spelling of 40409113 in words is "forty million, four hundred nine thousand, one hundred thirteen".