194987965 has 8 divisors (see below), whose sum is σ = 240309720. Its totient is φ = 151774272.

The previous prime is 194987957. The next prime is 194987983. The reversal of 194987965 is 569789491.

It can be written as a sum of positive squares in 4 ways, for example, as 116877721 + 78110244 = 10811^2 + 8838^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 194987965 - 2³ = 194987957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526810 + ... + 527179.

It is an arithmetic number, because the mean of its divisors is an integer number (30038715).

Almost surely, 2^194987965 is an apocalyptic number.

It is an amenable number.

194987965 is a deficient number, since it is larger than the sum of its proper divisors (45321755).

194987965 is a wasteful number, since it uses less digits than its factorization.

194987965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054031.

The product of its digits is 4898880, while the sum is 58.

The square root of 194987965 is about 13963.8091149944. The cubic root of 194987965 is about 579.8770696663.

The spelling of 194987965 in words is "one hundred ninety-four million, nine hundred eighty-seven thousand, nine hundred sixty-five".