40369609 has 4 divisors (see below), whose sum is σ = 46136704. Its totient is φ = 34602516.

The previous prime is 40369607. The next prime is 40369639. The reversal of 40369609 is 90696304.

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 40369609 - 2¹ = 40369607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40369607) 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, 2883537 + ... + 2883550.

It is an arithmetic number, because the mean of its divisors is an integer number (11534176).

Almost surely, 2^40369609 is an apocalyptic number.

It is an amenable number.

40369609 is a deficient number, since it is larger than the sum of its proper divisors (5767095).

40369609 is an equidigital number, since it uses as much as digits as its factorization.

40369609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5767094.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 40369609 is about 6353.7082872918. The cubic root of 40369609 is about 343.0453322604.

The spelling of 40369609 in words is "forty million, three hundred sixty-nine thousand, six hundred nine".