83818641 has 4 divisors (see below), whose sum is σ = 111758192. Its totient is φ = 55879092.

The previous prime is 83818627. The next prime is 83818663. The reversal of 83818641 is 14681838.

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 not a de Polignac number, because 83818641 - 2⁶ = 83818577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83818641.

It is not an unprimeable number, because it can be changed into a prime (83818681) 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, 13969771 + ... + 13969776.

It is an arithmetic number, because the mean of its divisors is an integer number (27939548).

Almost surely, 2^83818641 is an apocalyptic number.

It is an amenable number.

83818641 is a deficient number, since it is larger than the sum of its proper divisors (27939551).

83818641 is a wasteful number, since it uses less digits than its factorization.

83818641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27939550.

The product of its digits is 36864, while the sum is 39.

The square root of 83818641 is about 9155.2520992051. The cubic root of 83818641 is about 437.6365022769.

The spelling of 83818641 in words is "eighty-three million, eight hundred eighteen thousand, six hundred forty-one".