40706881 has 2 divisors, whose sum is σ = 40706882. Its totient is φ = 40706880.

The previous prime is 40706879. The next prime is 40706893. The reversal of 40706881 is 18860704.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35343025 + 5363856 = 5945^2 + 2316^2 .

It is a cyclic number.

It is not a de Polignac number, because 40706881 - 2¹ = 40706879 is a prime.

It is a super-2 number, since 2×40706881² = 3314100321496322, which contains 22 as substring.

Together with 40706879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40706801) 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, 20353440 + 20353441.

It is an arithmetic number, because the mean of its divisors is an integer number (20353441).

Almost surely, 2^40706881 is an apocalyptic number.

It is an amenable number.

40706881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40706881 is an equidigital number, since it uses as much as digits as its factorization.

40706881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 40706881 is about 6380.1944327740. The cubic root of 40706881 is about 343.9980197515.

The spelling of 40706881 in words is "forty million, seven hundred six thousand, eight hundred eighty-one".