40820761 has 2 divisors, whose sum is σ = 40820762. Its totient is φ = 40820760.

The previous prime is 40820753. The next prime is 40820783. The reversal of 40820761 is 16702804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34292736 + 6528025 = 5856^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 40820761 - 2³ = 40820753 is a prime.

It is not a weakly prime, because it can be changed into another prime (40820161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20410380 + 20410381.

It is an arithmetic number, because the mean of its divisors is an integer number (20410381).

Almost surely, 2^40820761 is an apocalyptic number.

It is an amenable number.

40820761 is a deficient number, since it is larger than the sum of its proper divisors (1).

40820761 is an equidigital number, since it uses as much as digits as its factorization.

40820761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 40820761 is about 6389.1126926984. The cubic root of 40820761 is about 344.3185062736.

The spelling of 40820761 in words is "forty million, eight hundred twenty thousand, seven hundred sixty-one".