83868861 has 4 divisors (see below), whose sum is σ = 111825152. Its totient is φ = 55912572.

The previous prime is 83868823. The next prime is 83868887. The reversal of 83868861 is 16886838.

It is a happy number.

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 83868861 - 2¹³ = 83860669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83868861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83868461) 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, 13978141 + ... + 13978146.

It is an arithmetic number, because the mean of its divisors is an integer number (27956288).

Almost surely, 2^83868861 is an apocalyptic number.

It is an amenable number.

83868861 is a deficient number, since it is larger than the sum of its proper divisors (27956291).

83868861 is a wasteful number, since it uses less digits than its factorization.

83868861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27956290.

The product of its digits is 442368, while the sum is 48.

The square root of 83868861 is about 9157.9943764997. The cubic root of 83868861 is about 437.7238882368.

The spelling of 83868861 in words is "eighty-three million, eight hundred sixty-eight thousand, eight hundred sixty-one".