84272689 has 10 divisors (see below), whose sum is σ = 89628410. Its totient is φ = 79236864.

The previous prime is 84272677. The next prime is 84272701. The reversal of 84272689 is 98627248.

It is an interprime number because it is at equal distance from previous prime (84272677) and next prime (84272701).

It can be written as a sum of positive squares in 5 ways, for example, as 824464 + 83448225 = 908^2 + 9135^2 .

It is not a de Polignac number, because 84272689 - 2¹³ = 84264497 is a prime.

It is a super-2 number, since 2×84272689² = 14203772222581442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84272609) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 83017 + ... + 84025.

It is an arithmetic number, because the mean of its divisors is an integer number (8962841).

Almost surely, 2^84272689 is an apocalyptic number.

It is an amenable number.

84272689 is a deficient number, since it is larger than the sum of its proper divisors (5355721).

84272689 is an frugal number, since it uses more digits than its factorization.

84272689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1026 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 84272689 is about 9180.0157407272. The cubic root of 84272689 is about 438.4253095154.

The spelling of 84272689 in words is "eighty-four million, two hundred seventy-two thousand, six hundred eighty-nine".