40613761 has 2 divisors, whose sum is σ = 40613762. Its totient is φ = 40613760.

The previous prime is 40613759. The next prime is 40613767. The reversal of 40613761 is 16731604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 1476225 = 6256^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 40613761 - 2¹ = 40613759 is a prime.

Together with 40613759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40613767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20306880 + 20306881.

It is an arithmetic number, because the mean of its divisors is an integer number (20306881).

Almost surely, 2^40613761 is an apocalyptic number.

It is an amenable number.

40613761 is a deficient number, since it is larger than the sum of its proper divisors (1).

40613761 is an equidigital number, since it uses as much as digits as its factorization.

40613761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 40613761 is about 6372.8926713071. The cubic root of 40613761 is about 343.7355125134.

The spelling of 40613761 in words is "forty million, six hundred thirteen thousand, seven hundred sixty-one".