83623861 has 4 divisors (see below), whose sum is σ = 83760012. Its totient is φ = 83487712.

The previous prime is 83623853. The next prime is 83623873. The reversal of 83623861 is 16832638.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33709636 + 49914225 = 5806^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 83623861 - 2³ = 83623853 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 83623861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83623961) 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, 67150 + ... + 68383.

It is an arithmetic number, because the mean of its divisors is an integer number (20940003).

Almost surely, 2^83623861 is an apocalyptic number.

It is an amenable number.

83623861 is a deficient number, since it is larger than the sum of its proper divisors (136151).

83623861 is a wasteful number, since it uses less digits than its factorization.

83623861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136150.

The product of its digits is 41472, while the sum is 37.

The square root of 83623861 is about 9144.6083021636. The cubic root of 83623861 is about 437.2972422104.

The spelling of 83623861 in words is "eighty-three million, six hundred twenty-three thousand, eight hundred sixty-one".