40147689 has 4 divisors (see below), whose sum is σ = 53530256. Its totient is φ = 26765124.

The previous prime is 40147669. The next prime is 40147711. The reversal of 40147689 is 98674104.

It is a happy number.

40147689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 40147689 - 2⁸ = 40147433 is a prime.

It is a super-2 number, since 2×40147689² = 3223673864081442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40147669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6691279 + ... + 6691284.

It is an arithmetic number, because the mean of its divisors is an integer number (13382564).

Almost surely, 2^40147689 is an apocalyptic number.

It is an amenable number.

40147689 is a deficient number, since it is larger than the sum of its proper divisors (13382567).

40147689 is a wasteful number, since it uses less digits than its factorization.

40147689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13382566.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40147689 is about 6336.2204033635. The cubic root of 40147689 is about 342.4155800960.

The spelling of 40147689 in words is "forty million, one hundred forty-seven thousand, six hundred eighty-nine".