195249973 has 2 divisors, whose sum is σ = 195249974. Its totient is φ = 195249972.

The previous prime is 195249931. The next prime is 195249979. The reversal of 195249973 is 379942591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194407249 + 842724 = 13943^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 195249973 - 2¹⁷ = 195118901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195249979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97624986 + 97624987.

It is an arithmetic number, because the mean of its divisors is an integer number (97624987).

Almost surely, 2^195249973 is an apocalyptic number.

It is an amenable number.

195249973 is a deficient number, since it is larger than the sum of its proper divisors (1).

195249973 is an equidigital number, since it uses as much as digits as its factorization.

195249973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 195249973 is about 13973.1876463461. The cubic root of 195249973 is about 580.1366830067.

The spelling of 195249973 in words is "one hundred ninety-five million, two hundred forty-nine thousand, nine hundred seventy-three".