163442999 has 2 divisors, whose sum is σ = 163443000. Its totient is φ = 163442998.

The previous prime is 163442989. The next prime is 163443001. The reversal of 163442999 is 999244361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163442999 - 2²⁰ = 162394423 is a prime.

It is a super-2 number, since 2×163442999² = 53427227844228002, which contains 22 as substring.

Together with 163443001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163442989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81721499 + 81721500.

It is an arithmetic number, because the mean of its divisors is an integer number (81721500).

Almost surely, 2^163442999 is an apocalyptic number.

163442999 is a deficient number, since it is larger than the sum of its proper divisors (1).

163442999 is an equidigital number, since it uses as much as digits as its factorization.

163442999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 163442999 is about 12784.4827427628. The cubic root of 163442999 is about 546.7499779251.

The spelling of 163442999 in words is "one hundred sixty-three million, four hundred forty-two thousand, nine hundred ninety-nine".