40788613 has 2 divisors, whose sum is σ = 40788614. Its totient is φ = 40788612.

The previous prime is 40788571. The next prime is 40788617. The reversal of 40788613 is 31688704.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 4524129 = 6022^2 + 2127^2 .

It is a cyclic number.

It is not a de Polignac number, because 40788613 - 2¹⁷ = 40657541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40788617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20394306 + 20394307.

It is an arithmetic number, because the mean of its divisors is an integer number (20394307).

Almost surely, 2^40788613 is an apocalyptic number.

It is an amenable number.

40788613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40788613 is an equidigital number, since it uses as much as digits as its factorization.

40788613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 40788613 is about 6386.5963548670. The cubic root of 40788613 is about 344.2280942859.

Subtracting from 40788613 its reverse (31688704), we obtain a palindrome (9099909).

The spelling of 40788613 in words is "forty million, seven hundred eighty-eight thousand, six hundred thirteen".