83409047 has 4 divisors (see below), whose sum is σ = 85443456. Its totient is φ = 81374640.

The previous prime is 83409041. The next prime is 83409049. The reversal of 83409047 is 74090438.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83409047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83408998 and 83409016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83409041) 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, 1017143 + ... + 1017224.

It is an arithmetic number, because the mean of its divisors is an integer number (21360864).

Almost surely, 2^83409047 is an apocalyptic number.

83409047 is a deficient number, since it is larger than the sum of its proper divisors (2034409).

83409047 is a wasteful number, since it uses less digits than its factorization.

83409047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034408.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 83409047 is about 9132.8553585393. The cubic root of 83409047 is about 436.9224762858.

The spelling of 83409047 in words is "eighty-three million, four hundred nine thousand, forty-seven".