40993081 has 2 divisors, whose sum is σ = 40993082. Its totient is φ = 40993080.

The previous prime is 40993063. The next prime is 40993087. The reversal of 40993081 is 18039904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 19053225 = 4684^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 40993081 - 2⁹ = 40992569 is a prime.

It is a super-2 number, since 2×40993081² = 3360865379745122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40993087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20496540 + 20496541.

It is an arithmetic number, because the mean of its divisors is an integer number (20496541).

Almost surely, 2^40993081 is an apocalyptic number.

It is an amenable number.

40993081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40993081 is an equidigital number, since it uses as much as digits as its factorization.

40993081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 40993081 is about 6402.5839315077. The cubic root of 40993081 is about 344.8023260242.

The spelling of 40993081 in words is "forty million, nine hundred ninety-three thousand, eighty-one".