83145978 has 24 divisors (see below), whose sum is σ = 182620308. Its totient is φ = 27335232.

The previous prime is 83145977. The next prime is 83146001. The reversal of 83145978 is 87954138.

It can be written as a sum of positive squares in 2 ways, for example, as 76160529 + 6985449 = 8727^2 + 2643^2 .

It is not an unprimeable number, because it can be changed into a prime (83145977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30325 + ... + 32952.

Almost surely, 2^83145978 is an apocalyptic number.

83145978 is an abundant number, since it is smaller than the sum of its proper divisors (99474330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83145978 is a wasteful number, since it uses less digits than its factorization.

83145978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63358 (or 63355 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 83145978 is about 9118.4416431757. The cubic root of 83145978 is about 436.4626468274.

The spelling of 83145978 in words is "eighty-three million, one hundred forty-five thousand, nine hundred seventy-eight".