847780231 has 2 divisors, whose sum is σ = 847780232. Its totient is φ = 847780230.

The previous prime is 847780201. The next prime is 847780267. The reversal of 847780231 is 132087748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 847780231 - 2⁹ = 847779719 is a prime.

It is a super-2 number, since 2×847780231² = 1437462640148826722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (847780201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423890115 + 423890116.

It is an arithmetic number, because the mean of its divisors is an integer number (423890116).

Almost surely, 2^847780231 is an apocalyptic number.

847780231 is a deficient number, since it is larger than the sum of its proper divisors (1).

847780231 is an equidigital number, since it uses as much as digits as its factorization.

847780231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 847780231 is about 29116.6658633848. The cubic root of 847780231 is about 946.4429235633.

The spelling of 847780231 in words is "eight hundred forty-seven million, seven hundred eighty thousand, two hundred thirty-one".