43308409 has 4 divisors (see below), whose sum is σ = 43494516. Its totient is φ = 43122304.

The previous prime is 43308373. The next prime is 43308427. The reversal of 43308409 is 90480334.

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 18835600 + 24472809 = 4340^2 + 4947^2 .

It is a cyclic number.

It is not a de Polignac number, because 43308409 - 2¹³ = 43300217 is a prime.

It is a super-2 number, since 2×43308409² = 3751236580222562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43308449) 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, 92704 + ... + 93169.

It is an arithmetic number, because the mean of its divisors is an integer number (10873629).

Almost surely, 2^43308409 is an apocalyptic number.

It is an amenable number.

43308409 is a deficient number, since it is larger than the sum of its proper divisors (186107).

43308409 is a wasteful number, since it uses less digits than its factorization.

43308409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186106.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43308409 is about 6580.9124747257. The cubic root of 43308409 is about 351.1753925202.

The spelling of 43308409 in words is "forty-three million, three hundred eight thousand, four hundred nine".