40919993 has 2 divisors, whose sum is σ = 40919994. Its totient is φ = 40919992.

The previous prime is 40919953. The next prime is 40919999. The reversal of 40919993 is 39991904.

40919993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34951744 + 5968249 = 5912^2 + 2443^2 .

It is a cyclic number.

It is not a de Polignac number, because 40919993 - 2²⁴ = 24142777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40919999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20459996 + 20459997.

It is an arithmetic number, because the mean of its divisors is an integer number (20459997).

Almost surely, 2^40919993 is an apocalyptic number.

It is an amenable number.

40919993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40919993 is an equidigital number, since it uses as much as digits as its factorization.

40919993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 40919993 is about 6396.8736895455. The cubic root of 40919993 is about 344.5972840689.

It can be divided in two parts, 409 and 19993, that added together give a palindrome (20402).

The spelling of 40919993 in words is "forty million, nine hundred nineteen thousand, nine hundred ninety-three".