847278017431 has 2 divisors, whose sum is σ = 847278017432. Its totient is φ = 847278017430.

The previous prime is 847278017429. The next prime is 847278017513. The reversal of 847278017431 is 134710872748.

847278017431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 847278017431 - 2¹ = 847278017429 is a prime.

It is a super-2 number, since 2×847278017431² (a number of 25 digits) contains 22 as substring.

Together with 847278017429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (847278017401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423639008715 + 423639008716.

It is an arithmetic number, because the mean of its divisors is an integer number (423639008716).

Almost surely, 2^847278017431 is an apocalyptic number.

847278017431 is a deficient number, since it is larger than the sum of its proper divisors (1).

847278017431 is an equidigital number, since it uses as much as digits as its factorization.

847278017431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The spelling of 847278017431 in words is "eight hundred forty-seven billion, two hundred seventy-eight million, seventeen thousand, four hundred thirty-one".