82470081 has 4 divisors (see below), whose sum is σ = 109960112. Its totient is φ = 54980052.

The previous prime is 82470049. The next prime is 82470107. The reversal of 82470081 is 18007428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82470081 - 2⁵ = 82470049 is a prime.

It is a super-2 number, since 2×82470081² = 13602628520293122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82470781) 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, 13745011 + ... + 13745016.

It is an arithmetic number, because the mean of its divisors is an integer number (27490028).

Almost surely, 2^82470081 is an apocalyptic number.

It is an amenable number.

82470081 is a deficient number, since it is larger than the sum of its proper divisors (27490031).

82470081 is a wasteful number, since it uses less digits than its factorization.

82470081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27490030.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 82470081 is about 9081.3039261991. The cubic root of 82470081 is about 435.2767534692.

The spelling of 82470081 in words is "eighty-two million, four hundred seventy thousand, eighty-one".