42797191 has 2 divisors, whose sum is σ = 42797192. Its totient is φ = 42797190.

The previous prime is 42797159. The next prime is 42797203. The reversal of 42797191 is 19179724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42797191 - 2⁵ = 42797159 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 (42197191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21398595 + 21398596.

It is an arithmetic number, because the mean of its divisors is an integer number (21398596).

Almost surely, 2^42797191 is an apocalyptic number.

42797191 is a deficient number, since it is larger than the sum of its proper divisors (1).

42797191 is an equidigital number, since it uses as much as digits as its factorization.

42797191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 40.

The square root of 42797191 is about 6541.9562059066. The cubic root of 42797191 is about 349.7881466219.

The spelling of 42797191 in words is "forty-two million, seven hundred ninety-seven thousand, one hundred ninety-one".