195051749 has 4 divisors (see below), whose sum is σ = 195200064. Its totient is φ = 194903436.

The previous prime is 195051733. The next prime is 195051751. The reversal of 195051749 is 947150591.

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: 947150591 = 613 ⋅1545107.

It is a cyclic number.

It is not a de Polignac number, because 195051749 - 2⁴ = 195051733 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 (195054749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72167 + ... + 74820.

It is an arithmetic number, because the mean of its divisors is an integer number (48800016).

Almost surely, 2^195051749 is an apocalyptic number.

It is an amenable number.

195051749 is a deficient number, since it is larger than the sum of its proper divisors (148315).

195051749 is a wasteful number, since it uses less digits than its factorization.

195051749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148314.

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 195051749 is about 13966.0928322849. The cubic root of 195051749 is about 579.9402921096.

The spelling of 195051749 in words is "one hundred ninety-five million, fifty-one thousand, seven hundred forty-nine".