163442919 has 4 divisors (see below), whose sum is σ = 217923896. Its totient is φ = 108961944.

The previous prime is 163442897. The next prime is 163442941. The reversal of 163442919 is 919244361.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (163442897) and next prime (163442941).

It is not a de Polignac number, because 163442919 - 2¹⁹ = 162918631 is a prime.

It is a super-2 number, since 2×163442919² = 53427175542481122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163442989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27240484 + ... + 27240489.

It is an arithmetic number, because the mean of its divisors is an integer number (54480974).

Almost surely, 2^163442919 is an apocalyptic number.

163442919 is a deficient number, since it is larger than the sum of its proper divisors (54480977).

163442919 is an equidigital number, since it uses as much as digits as its factorization.

163442919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54480976.

The product of its digits is 46656, while the sum is 39.

The square root of 163442919 is about 12784.4796139694. The cubic root of 163442919 is about 546.7498887197.

The spelling of 163442919 in words is "one hundred sixty-three million, four hundred forty-two thousand, nine hundred nineteen".