195555994 has 4 divisors (see below), whose sum is σ = 293333994. Its totient is φ = 97777996.

The previous prime is 195555991. The next prime is 195556001. The reversal of 195555994 is 499555591.

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., 126450025 + 69105969 = 11245^2 + 8313^2 .

It is not an unprimeable number, because it can be changed into a prime (195555991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48888997 + ... + 48889000.

Almost surely, 2^195555994 is an apocalyptic number.

195555994 is a deficient number, since it is larger than the sum of its proper divisors (97778000).

195555994 is an equidigital number, since it uses as much as digits as its factorization.

195555994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97777999.

The product of its digits is 1822500, while the sum is 52.

The square root of 195555994 is about 13984.1336521073. The cubic root of 195555994 is about 580.4396132016.

The spelling of 195555994 in words is "one hundred ninety-five million, five hundred fifty-five thousand, nine hundred ninety-four".