33400009 has 4 divisors (see below), whose sum is σ = 33775380. Its totient is φ = 33024640.

The previous prime is 33399991. The next prime is 33400021. The reversal of 33400009 is 90000433.

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 14040009 + 19360000 = 3747^2 + 4400^2 .

It is a cyclic number.

It is not a de Polignac number, because 33400009 - 2⁷ = 33399881 is a prime.

It is a super-2 number, since 2×33400009² = 2231121202400162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33400039) 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, 187552 + ... + 187729.

It is an arithmetic number, because the mean of its divisors is an integer number (8443845).

Almost surely, 2^33400009 is an apocalyptic number.

It is an amenable number.

33400009 is a deficient number, since it is larger than the sum of its proper divisors (375371).

33400009 is an equidigital number, since it uses as much as digits as its factorization.

33400009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375370.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 33400009 is about 5779.2740893645. The cubic root of 33400009 is about 322.0442341145.

The spelling of 33400009 in words is "thirty-three million, four hundred thousand, nine".