84393409 has 4 divisors (see below), whose sum is σ = 85461760. Its totient is φ = 83325060.

The previous prime is 84393373. The next prime is 84393461. The reversal of 84393409 is 90439348.

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 a de Polignac number, because none of the positive numbers 2^k-84393409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84393109) 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, 534057 + ... + 534214.

It is an arithmetic number, because the mean of its divisors is an integer number (21365440).

Almost surely, 2^84393409 is an apocalyptic number.

It is an amenable number.

84393409 is a deficient number, since it is larger than the sum of its proper divisors (1068351).

84393409 is a wasteful number, since it uses less digits than its factorization.

84393409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068350.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 84393409 is about 9186.5885398226. The cubic root of 84393409 is about 438.6345566302.

The spelling of 84393409 in words is "eighty-four million, three hundred ninety-three thousand, four hundred nine".