83641391 has 4 divisors (see below), whose sum is σ = 83726784. Its totient is φ = 83556000.

The previous prime is 83641387. The next prime is 83641403. The reversal of 83641391 is 19314638.

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

It is a cyclic number.

It is not a de Polignac number, because 83641391 - 2² = 83641387 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 (83641351) 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, 41210 + ... + 43191.

It is an arithmetic number, because the mean of its divisors is an integer number (20931696).

Almost surely, 2^83641391 is an apocalyptic number.

83641391 is a deficient number, since it is larger than the sum of its proper divisors (85393).

83641391 is an equidigital number, since it uses as much as digits as its factorization.

83641391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85392.

The product of its digits is 15552, while the sum is 35.

The square root of 83641391 is about 9145.5667402299. The cubic root of 83641391 is about 437.3277968271.

The spelling of 83641391 in words is "eighty-three million, six hundred forty-one thousand, three hundred ninety-one".