42691183 has 2 divisors, whose sum is σ = 42691184. Its totient is φ = 42691182.

The previous prime is 42691171. The next prime is 42691189. The reversal of 42691183 is 38119624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42691183 - 2²¹ = 40594031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42691189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21345591 + 21345592.

It is an arithmetic number, because the mean of its divisors is an integer number (21345592).

Almost surely, 2^42691183 is an apocalyptic number.

42691183 is a deficient number, since it is larger than the sum of its proper divisors (1).

42691183 is an equidigital number, since it uses as much as digits as its factorization.

42691183 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 42691183 is about 6533.8490187637. The cubic root of 42691183 is about 349.4991011729.

The spelling of 42691183 in words is "forty-two million, six hundred ninety-one thousand, one hundred eighty-three".