40365893 has 2 divisors, whose sum is σ = 40365894. Its totient is φ = 40365892.

The previous prime is 40365889. The next prime is 40365911. The reversal of 40365893 is 39856304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34304449 + 6061444 = 5857^2 + 2462^2 .

It is a cyclic number.

It is not a de Polignac number, because 40365893 - 2² = 40365889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40365833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20182946 + 20182947.

It is an arithmetic number, because the mean of its divisors is an integer number (20182947).

Almost surely, 2^40365893 is an apocalyptic number.

It is an amenable number.

40365893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40365893 is an equidigital number, since it uses as much as digits as its factorization.

40365893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 40365893 is about 6353.4158529094. The cubic root of 40365893 is about 343.0348062269.

The spelling of 40365893 in words is "forty million, three hundred sixty-five thousand, eight hundred ninety-three".