823870259 has 2 divisors, whose sum is σ = 823870260. Its totient is φ = 823870258.

The previous prime is 823870247. The next prime is 823870261. The reversal of 823870259 is 952078328.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823870259 is a prime.

It is a Sophie Germain prime.

Together with 823870261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (823870559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411935129 + 411935130.

It is an arithmetic number, because the mean of its divisors is an integer number (411935130).

Almost surely, 2^823870259 is an apocalyptic number.

823870259 is a deficient number, since it is larger than the sum of its proper divisors (1).

823870259 is an equidigital number, since it uses as much as digits as its factorization.

823870259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 823870259 is about 28703.1402289018. The cubic root of 823870259 is about 937.4604224833.

The spelling of 823870259 in words is "eight hundred twenty-three million, eight hundred seventy thousand, two hundred fifty-nine".