42781199 has 2 divisors, whose sum is σ = 42781200. Its totient is φ = 42781198.

The previous prime is 42781187. The next prime is 42781237. The reversal of 42781199 is 99118724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42781199 - 2⁴ = 42781183 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 (42781159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21390599 + 21390600.

It is an arithmetic number, because the mean of its divisors is an integer number (21390600).

Almost surely, 2^42781199 is an apocalyptic number.

42781199 is a deficient number, since it is larger than the sum of its proper divisors (1).

42781199 is an equidigital number, since it uses as much as digits as its factorization.

42781199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 42781199 is about 6540.7338273316. The cubic root of 42781199 is about 349.7445728203.

The spelling of 42781199 in words is "forty-two million, seven hundred eighty-one thousand, one hundred ninety-nine".