200400009 has 4 divisors (see below), whose sum is σ = 267200016. Its totient is φ = 133600004.

The previous prime is 200400007. The next prime is 200400017. The reversal of 200400009 is 900004002.

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 200400009 - 2¹ = 200400007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200400007) 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, 33399999 + ... + 33400004.

It is an arithmetic number, because the mean of its divisors is an integer number (66800004).

Almost surely, 2^200400009 is an apocalyptic number.

It is an amenable number.

200400009 is a deficient number, since it is larger than the sum of its proper divisors (66800007).

200400009 is an equidigital number, since it uses as much as digits as its factorization.

200400009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66800006.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 200400009 is about 14156.2710132294. The cubic root of 200400009 is about 585.1931658104.

The spelling of 200400009 in words is "two hundred million, four hundred thousand, nine".