82454681 has 4 divisors (see below), whose sum is σ = 82488372. Its totient is φ = 82420992.

The previous prime is 82454657. The next prime is 82454717. The reversal of 82454681 is 18645428.

It is a happy number.

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 54523456 + 27931225 = 7384^2 + 5285^2 .

It is a cyclic number.

It is not a de Polignac number, because 82454681 - 2²⁶ = 15345817 is a prime.

It is a super-2 number, since 2×82454681² = 13597548837623522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82454621) 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, 12860 + ... + 18173.

It is an arithmetic number, because the mean of its divisors is an integer number (20622093).

Almost surely, 2^82454681 is an apocalyptic number.

It is an amenable number.

82454681 is a deficient number, since it is larger than the sum of its proper divisors (33691).

82454681 is a wasteful number, since it uses less digits than its factorization.

82454681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33690.

The product of its digits is 61440, while the sum is 38.

The square root of 82454681 is about 9080.4559907529. The cubic root of 82454681 is about 435.2496580700.

The spelling of 82454681 in words is "eighty-two million, four hundred fifty-four thousand, six hundred eighty-one".