40866919 has 4 divisors (see below), whose sum is σ = 41000344. Its totient is φ = 40733496.

The previous prime is 40866913. The next prime is 40866941. The reversal of 40866919 is 91966804.

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 40866919 - 2³ = 40866911 is a prime.

It is a super-2 number, since 2×40866919² = 3340210137105122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40866911) 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, 66252 + ... + 66865.

It is an arithmetic number, because the mean of its divisors is an integer number (10250086).

Almost surely, 2^40866919 is an apocalyptic number.

40866919 is a deficient number, since it is larger than the sum of its proper divisors (133425).

40866919 is a wasteful number, since it uses less digits than its factorization.

40866919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133424.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 40866919 is about 6392.7239108224. The cubic root of 40866919 is about 344.4482365598.

The spelling of 40866919 in words is "forty million, eight hundred sixty-six thousand, nine hundred nineteen".