163899438 has 8 divisors (see below), whose sum is σ = 327798888. Its totient is φ = 54633144.

The previous prime is 163899433. The next prime is 163899443. The reversal of 163899438 is 834998361.

It is an interprime number because it is at equal distance from previous prime (163899433) and next prime (163899443).

It is a sphenic number, since it is the product of 3 distinct primes.

163899438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163899433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13658281 + ... + 13658292.

It is an arithmetic number, because the mean of its divisors is an integer number (40974861).

Almost surely, 2^163899438 is an apocalyptic number.

163899438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

163899438 is a wasteful number, since it uses less digits than its factorization.

163899438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27316578.

The product of its digits is 1119744, while the sum is 51.

The square root of 163899438 is about 12802.3215863374. The cubic root of 163899438 is about 547.2584652165.

The spelling of 163899438 in words is "one hundred sixty-three million, eight hundred ninety-nine thousand, four hundred thirty-eight".