40454009 has 4 divisors (see below), whose sum is σ = 40512420. Its totient is φ = 40395600.

The previous prime is 40453993. The next prime is 40454017. The reversal of 40454009 is 90045404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17682025 + 22771984 = 4205^2 + 4772^2 .

It is a cyclic number.

It is not a de Polignac number, because 40454009 - 2⁴ = 40453993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40451009) 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, 28154 + ... + 29555.

It is an arithmetic number, because the mean of its divisors is an integer number (10128105).

Almost surely, 2^40454009 is an apocalyptic number.

It is an amenable number.

40454009 is a deficient number, since it is larger than the sum of its proper divisors (58411).

40454009 is an equidigital number, since it uses as much as digits as its factorization.

40454009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58410.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40454009 is about 6360.3466100520. The cubic root of 40454009 is about 343.2842320415.

The spelling of 40454009 in words is "forty million, four hundred fifty-four thousand, nine".