40315609 has 4 divisors (see below), whose sum is σ = 40518400. Its totient is φ = 40112820.

The previous prime is 40315591. The next prime is 40315631. The reversal of 40315609 is 90651304.

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 40315609 - 2¹¹ = 40313561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40315909) 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, 101097 + ... + 101494.

It is an arithmetic number, because the mean of its divisors is an integer number (10129600).

Almost surely, 2^40315609 is an apocalyptic number.

It is an amenable number.

40315609 is a deficient number, since it is larger than the sum of its proper divisors (202791).

40315609 is a wasteful number, since it uses less digits than its factorization.

40315609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202790.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40315609 is about 6349.4573783907. The cubic root of 40315609 is about 342.8923069671.

The spelling of 40315609 in words is "forty million, three hundred fifteen thousand, six hundred nine".