83809421 has 8 divisors (see below), whose sum is σ = 84564480. Its totient is φ = 83058192.

The previous prime is 83809393. The next prime is 83809423. The reversal of 83809421 is 12490838.

It is a happy number.

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 83809421 - 2²² = 79615117 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 (83809423) 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, 57935 + ... + 59363.

It is an arithmetic number, because the mean of its divisors is an integer number (10570560).

Almost surely, 2^83809421 is an apocalyptic number.

It is an amenable number.

83809421 is a deficient number, since it is larger than the sum of its proper divisors (755059).

83809421 is a wasteful number, since it uses less digits than its factorization.

83809421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 83809421 is about 9154.7485492503. The cubic root of 83809421 is about 437.6204551046.

The spelling of 83809421 in words is "eighty-three million, eight hundred nine thousand, four hundred twenty-one".