40068791 has 4 divisors (see below), whose sum is σ = 45792912. Its totient is φ = 34344672.

The previous prime is 40068781. The next prime is 40068793. The reversal of 40068791 is 19786004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40068791 - 2¹⁰ = 40067767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40068793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2862050 + ... + 2862063.

It is an arithmetic number, because the mean of its divisors is an integer number (11448228).

Almost surely, 2^40068791 is an apocalyptic number.

40068791 is a deficient number, since it is larger than the sum of its proper divisors (5724121).

40068791 is an equidigital number, since it uses as much as digits as its factorization.

40068791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724120.

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

The square root of 40068791 is about 6329.9913901995. The cubic root of 40068791 is about 342.1911286466.

The spelling of 40068791 in words is "forty million, sixty-eight thousand, seven hundred ninety-one".