82748971 has 4 divisors (see below), whose sum is σ = 87104200. Its totient is φ = 78393744.

The previous prime is 82748957. The next prime is 82749061. The reversal of 82748971 is 17984728.

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 82748971 - 2⁹ = 82748459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82748371) 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, 2177586 + ... + 2177623.

It is an arithmetic number, because the mean of its divisors is an integer number (21776050).

Almost surely, 2^82748971 is an apocalyptic number.

82748971 is a deficient number, since it is larger than the sum of its proper divisors (4355229).

82748971 is a wasteful number, since it uses less digits than its factorization.

82748971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355228.

The product of its digits is 225792, while the sum is 46.

The square root of 82748971 is about 9096.6461401991. The cubic root of 82748971 is about 435.7668615125.

The spelling of 82748971 in words is "eighty-two million, seven hundred forty-eight thousand, nine hundred seventy-one".