40790681 has 2 divisors, whose sum is σ = 40790682. Its totient is φ = 40790680.

The previous prime is 40790669. The next prime is 40790683. The reversal of 40790681 is 18609704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 1915456 = 6235^2 + 1384^2 .

It is a cyclic number.

It is not a de Polignac number, because 40790681 - 2¹⁰ = 40789657 is a prime.

It is a super-2 number, since 2×40790681² = 3327759312887522, which contains 22 as substring.

Together with 40790683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40790683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20395340 + 20395341.

It is an arithmetic number, because the mean of its divisors is an integer number (20395341).

Almost surely, 2^40790681 is an apocalyptic number.

It is an amenable number.

40790681 is a deficient number, since it is larger than the sum of its proper divisors (1).

40790681 is an equidigital number, since it uses as much as digits as its factorization.

40790681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 40790681 is about 6386.7582543885. The cubic root of 40790681 is about 344.2339116912.

The spelling of 40790681 in words is "forty million, seven hundred ninety thousand, six hundred eighty-one".