197159994 has 24 divisors (see below), whose sum is σ = 443002560. Its totient is φ = 65719836.

The previous prime is 197159957. The next prime is 197160001. The reversal of 197159994 is 499951791.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 197159994.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 202354 + ... + 203325.

It is an arithmetic number, because the mean of its divisors is an integer number (18458440).

Almost surely, 2^197159994 is an apocalyptic number.

197159994 is an abundant number, since it is smaller than the sum of its proper divisors (245842566).

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

197159994 is an equidigital number, since it uses as much as digits as its factorization.

197159994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405696 (or 405684 counting only the distinct ones).

The product of its digits is 918540, while the sum is 54.

The square root of 197159994 is about 14041.3672411201. The cubic root of 197159994 is about 582.0222650638.

The spelling of 197159994 in words is "one hundred ninety-seven million, one hundred fifty-nine thousand, nine hundred ninety-four".