42831647 has 2 divisors, whose sum is σ = 42831648. Its totient is φ = 42831646.

The previous prime is 42831631. The next prime is 42831661. The reversal of 42831647 is 74613824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42831647 - 2⁴ = 42831631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42831847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21415823 + 21415824.

It is an arithmetic number, because the mean of its divisors is an integer number (21415824).

Almost surely, 2^42831647 is an apocalyptic number.

42831647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42831647 is an equidigital number, since it uses as much as digits as its factorization.

42831647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 42831647 is about 6544.5891391286. The cubic root of 42831647 is about 349.8819928699.

The spelling of 42831647 in words is "forty-two million, eight hundred thirty-one thousand, six hundred forty-seven".