195249577 has 2 divisors, whose sum is σ = 195249578. Its totient is φ = 195249576.

The previous prime is 195249569. The next prime is 195249611. The reversal of 195249577 is 775942591.

It is a happy number.

195249577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170459136 + 24790441 = 13056^2 + 4979^2 .

It is a cyclic number.

It is not a de Polignac number, because 195249577 - 2³ = 195249569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195249577.

It is not a weakly prime, because it can be changed into another prime (195249517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97624788 + 97624789.

It is an arithmetic number, because the mean of its divisors is an integer number (97624789).

Almost surely, 2^195249577 is an apocalyptic number.

It is an amenable number.

195249577 is a deficient number, since it is larger than the sum of its proper divisors (1).

195249577 is an equidigital number, since it uses as much as digits as its factorization.

195249577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 49.

The square root of 195249577 is about 13973.1734763439. The cubic root of 195249577 is about 580.1362908013.

It can be divided in two parts, 1952 and 49577, that added together give a square (51529 = 227²).

The spelling of 195249577 in words is "one hundred ninety-five million, two hundred forty-nine thousand, five hundred seventy-seven".