83618491 has 4 divisors (see below), whose sum is σ = 91220184. Its totient is φ = 76016800.

The previous prime is 83618477. The next prime is 83618497. The reversal of 83618491 is 19481638.

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 83618491 - 2¹⁹ = 83094203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83618497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3800830 + ... + 3800851.

It is an arithmetic number, because the mean of its divisors is an integer number (22805046).

Almost surely, 2^83618491 is an apocalyptic number.

83618491 is a deficient number, since it is larger than the sum of its proper divisors (7601693).

83618491 is a wasteful number, since it uses less digits than its factorization.

83618491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601692.

The product of its digits is 41472, while the sum is 40.

The square root of 83618491 is about 9144.3146818119. The cubic root of 83618491 is about 437.2878814991.

The spelling of 83618491 in words is "eighty-three million, six hundred eighteen thousand, four hundred ninety-one".