40731893 has 2 divisors, whose sum is σ = 40731894. Its totient is φ = 40731892.

The previous prime is 40731871. The next prime is 40731937. The reversal of 40731893 is 39813704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 1067089 = 6298^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 40731893 - 2⁸ = 40731637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40731833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20365946 + 20365947.

It is an arithmetic number, because the mean of its divisors is an integer number (20365947).

Almost surely, 2^40731893 is an apocalyptic number.

It is an amenable number.

40731893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40731893 is an equidigital number, since it uses as much as digits as its factorization.

40731893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 40731893 is about 6382.1542601225. The cubic root of 40731893 is about 344.0684608877.

The spelling of 40731893 in words is "forty million, seven hundred thirty-one thousand, eight hundred ninety-three".