83969618 has 4 divisors (see below), whose sum is σ = 125954430. Its totient is φ = 41984808.

The previous prime is 83969609. The next prime is 83969623. The reversal of 83969618 is 81696938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81696938 = 2 ⋅40848469.

It can be written as a sum of positive squares in only one way, i.e., 83302129 + 667489 = 9127^2 + 817^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20992403 + ... + 20992406.

Almost surely, 2^83969618 is an apocalyptic number.

83969618 is a deficient number, since it is larger than the sum of its proper divisors (41984812).

83969618 is a wasteful number, since it uses less digits than its factorization.

83969618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41984811.

The product of its digits is 559872, while the sum is 50.

The square root of 83969618 is about 9163.4937660261. The cubic root of 83969618 is about 437.8991066095.

The spelling of 83969618 in words is "eighty-three million, nine hundred sixty-nine thousand, six hundred eighteen".