194597873 has 2 divisors, whose sum is σ = 194597874. Its totient is φ = 194597872.

The previous prime is 194597857. The next prime is 194597903. The reversal of 194597873 is 378795491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128777104 + 65820769 = 11348^2 + 8113^2 .

It is an emirp because it is prime and its reverse (378795491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194597873 - 2⁴ = 194597857 is a prime.

It is a super-2 number, since 2×194597873² = 75736664352248258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194597773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97298936 + 97298937.

It is an arithmetic number, because the mean of its divisors is an integer number (97298937).

Almost surely, 2^194597873 is an apocalyptic number.

194597873 is the 7457-th centered heptagonal number.

It is an amenable number.

194597873 is a deficient number, since it is larger than the sum of its proper divisors (1).

194597873 is an equidigital number, since it uses as much as digits as its factorization.

194597873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 194597873 is about 13949.8341567203. The cubic root of 194597873 is about 579.4901117289.

The spelling of 194597873 in words is "one hundred ninety-four million, five hundred ninety-seven thousand, eight hundred seventy-three".