42194993 has 2 divisors, whose sum is σ = 42194994. Its totient is φ = 42194992.

The previous prime is 42194983. The next prime is 42195053. The reversal of 42194993 is 39949124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22543504 + 19651489 = 4748^2 + 4433^2 .

It is a cyclic number.

It is not a de Polignac number, because 42194993 - 2¹⁶ = 42129457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42194993.

It is not a weakly prime, because it can be changed into another prime (42194983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21097496 + 21097497.

It is an arithmetic number, because the mean of its divisors is an integer number (21097497).

Almost surely, 2^42194993 is an apocalyptic number.

It is an amenable number.

42194993 is a deficient number, since it is larger than the sum of its proper divisors (1).

42194993 is an equidigital number, since it uses as much as digits as its factorization.

42194993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 42194993 is about 6495.7673141824. The cubic root of 42194993 is about 348.1397713306.

The spelling of 42194993 in words is "forty-two million, one hundred ninety-four thousand, nine hundred ninety-three".