83611018 has 4 divisors (see below), whose sum is σ = 125416530. Its totient is φ = 41805508.

The previous prime is 83610997. The next prime is 83611019. The reversal of 83611018 is 81011638.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81011638 = 2 ⋅40505819.

It can be written as a sum of positive squares in only one way, i.e., 52664049 + 30946969 = 7257^2 + 5563^2 .

It is not an unprimeable number, because it can be changed into a prime (83611019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20902753 + ... + 20902756.

Almost surely, 2^83611018 is an apocalyptic number.

83611018 is a deficient number, since it is larger than the sum of its proper divisors (41805512).

83611018 is a wasteful number, since it uses less digits than its factorization.

83611018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41805511.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 83611018 is about 9143.9060581351. The cubic root of 83611018 is about 437.2748542781.

The spelling of 83611018 in words is "eighty-three million, six hundred eleven thousand, eighteen".