83189378 has 4 divisors (see below), whose sum is σ = 124784070. Its totient is φ = 41594688.

The previous prime is 83189377. The next prime is 83189387. The reversal of 83189378 is 87398138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 82391929 + 797449 = 9077^2 + 893^2 .

It is a super-2 number, since 2×83189378² = 13840945224053768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83189377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20797343 + ... + 20797346.

Almost surely, 2^83189378 is an apocalyptic number.

83189378 is a deficient number, since it is larger than the sum of its proper divisors (41594692).

83189378 is a wasteful number, since it uses less digits than its factorization.

83189378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41594691.

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

The square root of 83189378 is about 9120.8211253154. The cubic root of 83189378 is about 436.5385742684.

It can be divided in two parts, 831 and 89378, that added together give a palindrome (90209).

The spelling of 83189378 in words is "eighty-three million, one hundred eighty-nine thousand, three hundred seventy-eight".