194156986 has 4 divisors (see below), whose sum is σ = 291235482. Its totient is φ = 97078492.

The previous prime is 194156981. The next prime is 194156993. The reversal of 194156986 is 689651491.

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

It can be written as a sum of positive squares in only one way, i.e., 167314225 + 26842761 = 12935^2 + 5181^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (194156981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48539245 + ... + 48539248.

Almost surely, 2^194156986 is an apocalyptic number.

194156986 is a deficient number, since it is larger than the sum of its proper divisors (97078496).

194156986 is an equidigital number, since it uses as much as digits as its factorization.

194156986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97078495.

The product of its digits is 466560, while the sum is 49.

The square root of 194156986 is about 13934.0226065555. The cubic root of 194156986 is about 579.0521438577.

The spelling of 194156986 in words is "one hundred ninety-four million, one hundred fifty-six thousand, nine hundred eighty-six".