40489609 has 4 divisors (see below), whose sum is σ = 40882816. Its totient is φ = 40096404.

The previous prime is 40489583. The next prime is 40489613. The reversal of 40489609 is 90698404.

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 40489609 - 2⁵ = 40489577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40489649) 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, 196449 + ... + 196654.

It is an arithmetic number, because the mean of its divisors is an integer number (10220704).

Almost surely, 2^40489609 is an apocalyptic number.

It is an amenable number.

40489609 is a deficient number, since it is larger than the sum of its proper divisors (393207).

40489609 is a wasteful number, since it uses less digits than its factorization.

40489609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393206.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 40489609 is about 6363.1445842445. The cubic root of 40489609 is about 343.3849005608.

The spelling of 40489609 in words is "forty million, four hundred eighty-nine thousand, six hundred nine".