83918305 has 4 divisors (see below), whose sum is σ = 100701972. Its totient is φ = 67134640.

The previous prime is 83918299. The next prime is 83918309. The reversal of 83918305 is 50381938.

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 26749584 + 57168721 = 5172^2 + 7561^2 .

It is not a de Polignac number, because 83918305 - 2¹⁵ = 83885537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83918309) 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, 8391826 + ... + 8391835.

It is an arithmetic number, because the mean of its divisors is an integer number (25175493).

Almost surely, 2^83918305 is an apocalyptic number.

It is an amenable number.

83918305 is a deficient number, since it is larger than the sum of its proper divisors (16783667).

83918305 is a wasteful number, since it uses less digits than its factorization.

83918305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16783666.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 83918305 is about 9160.6934781162. The cubic root of 83918305 is about 437.8098898349.

The spelling of 83918305 in words is "eighty-three million, nine hundred eighteen thousand, three hundred five".