83671281 has 6 divisors (see below), whose sum is σ = 120858530. Its totient is φ = 55780848.

The previous prime is 83671267. The next prime is 83671337. The reversal of 83671281 is 18217638.

It can be written as a sum of positive squares in only one way, i.e., 70711281 + 12960000 = 8409^2 + 3600^2 .

It is not a de Polignac number, because 83671281 - 2²⁵ = 50116849 is a prime.

It is a super-2 number, since 2×83671281² = 14001766528361922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83671781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4648396 + ... + 4648413.

Almost surely, 2^83671281 is an apocalyptic number.

It is an amenable number.

83671281 is a deficient number, since it is larger than the sum of its proper divisors (37187249).

83671281 is a wasteful number, since it uses less digits than its factorization.

83671281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9296815 (or 9296812 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 83671281 is about 9147.2007193458. The cubic root of 83671281 is about 437.3798849576.

The spelling of 83671281 in words is "eighty-three million, six hundred seventy-one thousand, two hundred eighty-one".