83409861 has 8 divisors (see below), whose sum is σ = 111922144. Its totient is φ = 55252080.

The previous prime is 83409857. The next prime is 83409947. The reversal of 83409861 is 16890438.

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

It is not a de Polignac number, because 83409861 - 2² = 83409857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83409811) 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, 88075 + ... + 89016.

It is an arithmetic number, because the mean of its divisors is an integer number (13990268).

Almost surely, 2^83409861 is an apocalyptic number.

It is an amenable number.

83409861 is a deficient number, since it is larger than the sum of its proper divisors (28512283).

83409861 is a wasteful number, since it uses less digits than its factorization.

83409861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177251.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 83409861 is about 9132.8999228066. The cubic root of 83409861 is about 436.9238976094.

The spelling of 83409861 in words is "eighty-three million, four hundred nine thousand, eight hundred sixty-one".