42316991 has 2 divisors, whose sum is σ = 42316992. Its totient is φ = 42316990.

The previous prime is 42316973. The next prime is 42317017. The reversal of 42316991 is 19961324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42316991 - 2¹⁰ = 42315967 is a 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 (42316951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21158495 + 21158496.

It is an arithmetic number, because the mean of its divisors is an integer number (21158496).

Almost surely, 2^42316991 is an apocalyptic number.

42316991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42316991 is an equidigital number, since it uses as much as digits as its factorization.

42316991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 42316991 is about 6505.1511127721. The cubic root of 42316991 is about 348.4749729356.

The spelling of 42316991 in words is "forty-two million, three hundred sixteen thousand, nine hundred ninety-one".