83878571 has 4 divisors (see below), whose sum is σ = 95861232. Its totient is φ = 71895912.

The previous prime is 83878549. The next prime is 83878583. The reversal of 83878571 is 17587838.

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

It is a cyclic number.

It is not a de Polignac number, because 83878571 - 2¹⁸ = 83616427 is a prime.

It is a super-2 number, since 2×83878571² = 14071229346004082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83878511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5991320 + ... + 5991333.

It is an arithmetic number, because the mean of its divisors is an integer number (23965308).

Almost surely, 2^83878571 is an apocalyptic number.

83878571 is a deficient number, since it is larger than the sum of its proper divisors (11982661).

83878571 is a wasteful number, since it uses less digits than its factorization.

83878571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11982660.

The product of its digits is 376320, while the sum is 47.

The square root of 83878571 is about 9158.5244990664. The cubic root of 83878571 is about 437.7407802230.

The spelling of 83878571 in words is "eighty-three million, eight hundred seventy-eight thousand, five hundred seventy-one".