40943689 has 4 divisors (see below), whose sum is σ = 43098640. Its totient is φ = 38788740.

The previous prime is 40943681. The next prime is 40943713. The reversal of 40943689 is 98634904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40943689 - 2³ = 40943681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40943681) 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, 1077447 + ... + 1077484.

It is an arithmetic number, because the mean of its divisors is an integer number (10774660).

Almost surely, 2^40943689 is an apocalyptic number.

It is an amenable number.

40943689 is a deficient number, since it is larger than the sum of its proper divisors (2154951).

40943689 is a wasteful number, since it uses less digits than its factorization.

40943689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154950.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 40943689 is about 6398.7255762378. The cubic root of 40943689 is about 344.6637878402.

The spelling of 40943689 in words is "forty million, nine hundred forty-three thousand, six hundred eighty-nine".