42810791 has 2 divisors, whose sum is σ = 42810792. Its totient is φ = 42810790.

The previous prime is 42810787. The next prime is 42810821. The reversal of 42810791 is 19701824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42810791 - 2² = 42810787 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42810701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21405395 + 21405396.

It is an arithmetic number, because the mean of its divisors is an integer number (21405396).

Almost surely, 2^42810791 is an apocalyptic number.

42810791 is a deficient number, since it is larger than the sum of its proper divisors (1).

42810791 is an equidigital number, since it uses as much as digits as its factorization.

42810791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 42810791 is about 6542.9955677809. The cubic root of 42810791 is about 349.8251943414.

The spelling of 42810791 in words is "forty-two million, eight hundred ten thousand, seven hundred ninety-one".