83378918 has 16 divisors (see below), whose sum is σ = 145359360. Its totient is φ = 35127816.

The previous prime is 83378909. The next prime is 83378927. The reversal of 83378918 is 81987338.

It is an interprime number because it is at equal distance from previous prime (83378909) and next prime (83378927).

It is a super-3 number, since 3×83378918³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49646 + ... + 51297.

It is an arithmetic number, because the mean of its divisors is an integer number (9084960).

Almost surely, 2^83378918 is an apocalyptic number.

83378918 is a deficient number, since it is larger than the sum of its proper divisors (61980442).

83378918 is a wasteful number, since it uses less digits than its factorization.

83378918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101011.

The product of its digits is 290304, while the sum is 47.

The square root of 83378918 is about 9131.2057254231. The cubic root of 83378918 is about 436.8698615990.

The spelling of 83378918 in words is "eighty-three million, three hundred seventy-eight thousand, nine hundred eighteen".