823470971 has 4 divisors (see below), whose sum is σ = 833392392. Its totient is φ = 813549552.

The previous prime is 823470959. The next prime is 823470983. The reversal of 823470971 is 179074328.

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

It is an interprime number because it is at equal distance from previous prime (823470959) and next prime (823470983).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823470971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823470371) 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, 4960586 + ... + 4960751.

It is an arithmetic number, because the mean of its divisors is an integer number (208348098).

Almost surely, 2^823470971 is an apocalyptic number.

823470971 is a deficient number, since it is larger than the sum of its proper divisors (9921421).

823470971 is an equidigital number, since it uses as much as digits as its factorization.

823470971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9921420.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 823470971 is about 28696.1839100602. The cubic root of 823470971 is about 937.3089515528.

The spelling of 823470971 in words is "eight hundred twenty-three million, four hundred seventy thousand, nine hundred seventy-one".