847974431 has 2 divisors, whose sum is σ = 847974432. Its totient is φ = 847974430.

The previous prime is 847974367. The next prime is 847974437. The reversal of 847974431 is 134479748.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 847974431 - 2⁶ = 847974367 is a prime.

It is a super-2 number, since 2×847974431² = 1438121271259547522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (847974437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423987215 + 423987216.

It is an arithmetic number, because the mean of its divisors is an integer number (423987216).

Almost surely, 2^847974431 is an apocalyptic number.

847974431 is a deficient number, since it is larger than the sum of its proper divisors (1).

847974431 is an equidigital number, since it uses as much as digits as its factorization.

847974431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 847974431 is about 29120.0005322802. Note that the first 3 decimals coincide. The cubic root of 847974431 is about 946.5151848941.

The spelling of 847974431 in words is "eight hundred forty-seven million, nine hundred seventy-four thousand, four hundred thirty-one".