40795981 has 2 divisors, whose sum is σ = 40795982. Its totient is φ = 40795980.

The previous prime is 40795973. The next prime is 40795991. The reversal of 40795981 is 18959704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23912100 + 16883881 = 4890^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 40795981 - 2³ = 40795973 is a prime.

It is a super-2 number, since 2×40795981² = 3328624131504722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40795921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20397990 + 20397991.

It is an arithmetic number, because the mean of its divisors is an integer number (20397991).

Almost surely, 2^40795981 is an apocalyptic number.

It is an amenable number.

40795981 is a deficient number, since it is larger than the sum of its proper divisors (1).

40795981 is an equidigital number, since it uses as much as digits as its factorization.

40795981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 40795981 is about 6387.1731618925. The cubic root of 40795981 is about 344.2488200042.

The spelling of 40795981 in words is "forty million, seven hundred ninety-five thousand, nine hundred eighty-one".