84272681 has 4 divisors (see below), whose sum is σ = 84514500. Its totient is φ = 84030864.

The previous prime is 84272677. The next prime is 84272701. The reversal of 84272681 is 18627248.

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

It can be written as a sum of positive squares in 2 ways, for example, as 74563225 + 9709456 = 8635^2 + 3116^2 .

It is a cyclic number.

It is not a de Polignac number, because 84272681 - 2² = 84272677 is a prime.

It is a super-2 number, since 2×84272681² = 14203769525855522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84272611) 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, 120386 + ... + 121083.

It is an arithmetic number, because the mean of its divisors is an integer number (21128625).

Almost surely, 2^84272681 is an apocalyptic number.

It is an amenable number.

84272681 is a deficient number, since it is larger than the sum of its proper divisors (241819).

84272681 is a wasteful number, since it uses less digits than its factorization.

84272681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241818.

The product of its digits is 43008, while the sum is 38.

The square root of 84272681 is about 9180.0153049981. The cubic root of 84272681 is about 438.4252956421.

The spelling of 84272681 in words is "eighty-four million, two hundred seventy-two thousand, six hundred eighty-one".