82570947 has 4 divisors (see below), whose sum is σ = 110094600. Its totient is φ = 55047296.

The previous prime is 82570931. The next prime is 82570951. The reversal of 82570947 is 74907528.

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

It is a cyclic number.

It is not a de Polignac number, because 82570947 - 2⁴ = 82570931 is a prime.

It is a super-2 number, since 2×82570947² = 13635922576953618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82570899 and 82570908.

It is not an unprimeable number, because it can be changed into a prime (82570967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13761822 + ... + 13761827.

It is an arithmetic number, because the mean of its divisors is an integer number (27523650).

Almost surely, 2^82570947 is an apocalyptic number.

82570947 is a deficient number, since it is larger than the sum of its proper divisors (27523653).

82570947 is a wasteful number, since it uses less digits than its factorization.

82570947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27523652.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 82570947 is about 9086.8557268177. The cubic root of 82570947 is about 435.4541379512.

The spelling of 82570947 in words is "eighty-two million, five hundred seventy thousand, nine hundred forty-seven".