195249849 has 4 divisors (see below), whose sum is σ = 260333136. Its totient is φ = 130166564.

The previous prime is 195249773. The next prime is 195249853. The reversal of 195249849 is 948942591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 948942591 = 3 ⋅316314197.

It is a cyclic number.

It is not a de Polignac number, because 195249849 - 2¹⁵ = 195217081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195249889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32541639 + ... + 32541644.

It is an arithmetic number, because the mean of its divisors is an integer number (65083284).

Almost surely, 2^195249849 is an apocalyptic number.

It is an amenable number.

195249849 is a deficient number, since it is larger than the sum of its proper divisors (65083287).

195249849 is an equidigital number, since it uses as much as digits as its factorization.

195249849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65083286.

The product of its digits is 933120, while the sum is 51.

The square root of 195249849 is about 13973.1832092763. The cubic root of 195249849 is about 580.1365601949.

The spelling of 195249849 in words is "one hundred ninety-five million, two hundred forty-nine thousand, eight hundred forty-nine".