40363613 has 2 divisors, whose sum is σ = 40363614. Its totient is φ = 40363612.

The previous prime is 40363607. The next prime is 40363663. The reversal of 40363613 is 31636304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27019204 + 13344409 = 5198^2 + 3653^2 .

It is a cyclic number.

It is not a de Polignac number, because 40363613 - 2¹⁸ = 40101469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40363663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20181806 + 20181807.

It is an arithmetic number, because the mean of its divisors is an integer number (20181807).

Almost surely, 2^40363613 is an apocalyptic number.

It is an amenable number.

40363613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40363613 is an equidigital number, since it uses as much as digits as its factorization.

40363613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 40363613 is about 6353.2364193378. The cubic root of 40363613 is about 343.0283475227.

Adding to 40363613 its reverse (31636304), we get a palindrome (71999917).

The spelling of 40363613 in words is "forty million, three hundred sixty-three thousand, six hundred thirteen".