40689683 has 4 divisors (see below), whose sum is σ = 40753608. Its totient is φ = 40625760.

The previous prime is 40689673. The next prime is 40689707. The reversal of 40689683 is 38698604.

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 40689683 - 2⁴ = 40689667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40689673) 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 in 3 ways as a sum of consecutive naturals, for example, 30998 + ... + 32283.

It is an arithmetic number, because the mean of its divisors is an integer number (10188402).

Almost surely, 2^40689683 is an apocalyptic number.

40689683 is a deficient number, since it is larger than the sum of its proper divisors (63925).

40689683 is an equidigital number, since it uses as much as digits as its factorization.

40689683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63924.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 40689683 is about 6378.8465258227. The cubic root of 40689683 is about 343.9495683911.

The spelling of 40689683 in words is "forty million, six hundred eighty-nine thousand, six hundred eighty-three".