163400998 has 4 divisors (see below), whose sum is σ = 245101500. Its totient is φ = 81700498.

The previous prime is 163400981. The next prime is 163401013. The reversal of 163400998 is 899004361.

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

It is a super-2 number, since 2×163400998² = 53399772294792008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 163400998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40850248 + ... + 40850251.

It is an arithmetic number, because the mean of its divisors is an integer number (61275375).

Almost surely, 2^163400998 is an apocalyptic number.

163400998 is a deficient number, since it is larger than the sum of its proper divisors (81700502).

163400998 is an equidigital number, since it uses as much as digits as its factorization.

163400998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81700501.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 163400998 is about 12782.8399817881. The cubic root of 163400998 is about 546.7031399586.

The spelling of 163400998 in words is "one hundred sixty-three million, four hundred thousand, nine hundred ninety-eight".