40207009 has 4 divisors (see below), whose sum is σ = 40222000. Its totient is φ = 40192020.

The previous prime is 40207007. The next prime is 40207033. The reversal of 40207009 is 90070204.

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 40207009 - 2¹ = 40207007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40207007) 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, 2247 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (10055500).

Almost surely, 2^40207009 is an apocalyptic number.

It is an amenable number.

40207009 is a deficient number, since it is larger than the sum of its proper divisors (14991).

40207009 is a wasteful number, since it uses less digits than its factorization.

40207009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14990.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 40207009 is about 6340.8996995695. The cubic root of 40207009 is about 342.5841418647.

The spelling of 40207009 in words is "forty million, two hundred seven thousand, nine".