871245523 has 2 divisors, whose sum is σ = 871245524. Its totient is φ = 871245522.

The previous prime is 871245509. The next prime is 871245541. The reversal of 871245523 is 325542178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 871245523 - 2²⁵ = 837691091 is a prime.

It is a super-2 number, since 2×871245523² = 1518137522695087058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (871245503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435622761 + 435622762.

It is an arithmetic number, because the mean of its divisors is an integer number (435622762).

Almost surely, 2^871245523 is an apocalyptic number.

871245523 is a deficient number, since it is larger than the sum of its proper divisors (1).

871245523 is an equidigital number, since it uses as much as digits as its factorization.

871245523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 871245523 is about 29516.8684483974. The cubic root of 871245523 is about 955.0956193833.

The spelling of 871245523 in words is "eight hundred seventy-one million, two hundred forty-five thousand, five hundred twenty-three".