43402609 has 8 divisors (see below), whose sum is σ = 44950752. Its totient is φ = 41879040.

The previous prime is 43402603. The next prime is 43402643. The reversal of 43402609 is 90620434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43402609 - 2⁵ = 43402577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43402603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2512 + ... + 9649.

It is an arithmetic number, because the mean of its divisors is an integer number (5618844).

Almost surely, 2^43402609 is an apocalyptic number.

It is an amenable number.

43402609 is a deficient number, since it is larger than the sum of its proper divisors (1548143).

43402609 is a wasteful number, since it uses less digits than its factorization.

43402609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12287.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 43402609 is about 6588.0656493390. The cubic root of 43402609 is about 351.4298216799.

The spelling of 43402609 in words is "forty-three million, four hundred two thousand, six hundred nine".