40689499 has 4 divisors (see below), whose sum is σ = 40812760. Its totient is φ = 40566240.

The previous prime is 40689497. The next prime is 40689557. The reversal of 40689499 is 99498604.

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 40689499 - 2¹ = 40689497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40689491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61134 + ... + 61795.

It is an arithmetic number, because the mean of its divisors is an integer number (10203190).

Almost surely, 2^40689499 is an apocalyptic number.

40689499 is a deficient number, since it is larger than the sum of its proper divisors (123261).

40689499 is a wasteful number, since it uses less digits than its factorization.

40689499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123260.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 40689499 is about 6378.8321031361. The cubic root of 40689499 is about 343.9490499402.

The spelling of 40689499 in words is "forty million, six hundred eighty-nine thousand, four hundred ninety-nine".