40393841 has 2 divisors, whose sum is σ = 40393842. Its totient is φ = 40393840.

The previous prime is 40393789. The next prime is 40393877. The reversal of 40393841 is 14839304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30913600 + 9480241 = 5560^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 40393841 - 2⁶ = 40393777 is a prime.

It is a super-3 number, since 3×40393841³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40393798 and 40393807.

It is not a weakly prime, because it can be changed into another prime (40393141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20196920 + 20196921.

It is an arithmetic number, because the mean of its divisors is an integer number (20196921).

Almost surely, 2^40393841 is an apocalyptic number.

It is an amenable number.

40393841 is a deficient number, since it is larger than the sum of its proper divisors (1).

40393841 is an equidigital number, since it uses as much as digits as its factorization.

40393841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 40393841 is about 6355.6149191089. The cubic root of 40393841 is about 343.1139565879.

The spelling of 40393841 in words is "forty million, three hundred ninety-three thousand, eight hundred forty-one".