163442994 has 64 divisors (see below), whose sum is σ = 389587968. Its totient is φ = 45057600.

The previous prime is 163442989. The next prime is 163442999. The reversal of 163442994 is 499244361.

It is an interprime number because it is at equal distance from previous prime (163442989) and next prime (163442999).

It is a super-2 number, since 2×163442994² = 53427224575368072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163442999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59577 + ... + 62259.

It is an arithmetic number, because the mean of its divisors is an integer number (6087312).

Almost surely, 2^163442994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163442994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194793984).

163442994 is an abundant number, since it is smaller than the sum of its proper divisors (226144974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163442994 is a wasteful number, since it uses less digits than its factorization.

163442994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783.

The product of its digits is 186624, while the sum is 42.

The square root of 163442994 is about 12784.4825472132. The cubic root of 163442994 is about 546.7499723498.

The spelling of 163442994 in words is "one hundred sixty-three million, four hundred forty-two thousand, nine hundred ninety-four".