42161699 has 2 divisors, whose sum is σ = 42161700. Its totient is φ = 42161698.

The previous prime is 42161687. The next prime is 42161719. The reversal of 42161699 is 99616124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42161699 - 2⁸ = 42161443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42166699) 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, 21080849 + 21080850.

It is an arithmetic number, because the mean of its divisors is an integer number (21080850).

Almost surely, 2^42161699 is an apocalyptic number.

42161699 is a deficient number, since it is larger than the sum of its proper divisors (1).

42161699 is an equidigital number, since it uses as much as digits as its factorization.

42161699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 42161699 is about 6493.2040627105. The cubic root of 42161699 is about 348.0481805621.

The spelling of 42161699 in words is "forty-two million, one hundred sixty-one thousand, six hundred ninety-nine".