194920973 has 4 divisors (see below), whose sum is σ = 209914908. Its totient is φ = 179927040.

The previous prime is 194920969. The next prime is 194920993. The reversal of 194920973 is 379029491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123721129 + 71199844 = 11123^2 + 8438^2 .

It is a cyclic number.

It is not a de Polignac number, because 194920973 - 2² = 194920969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194920903) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7496948 + ... + 7496973.

It is an arithmetic number, because the mean of its divisors is an integer number (52478727).

Almost surely, 2^194920973 is an apocalyptic number.

194920973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

194920973 is a deficient number, since it is larger than the sum of its proper divisors (14993935).

194920973 is a wasteful number, since it uses less digits than its factorization.

194920973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14993934.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 194920973 is about 13961.4101365156. The cubic root of 194920973 is about 579.8106526195.

It can be divided in two parts, 1949 and 20973, that added together give a palindrome (22922).

The spelling of 194920973 in words is "one hundred ninety-four million, nine hundred twenty thousand, nine hundred seventy-three".