195299149 has 4 divisors (see below), whose sum is σ = 195989536. Its totient is φ = 194608764.

The previous prime is 195299107. The next prime is 195299191. The reversal of 195299149 is 941992591.

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: 941992591 = 439 ⋅2145769.

It is an interprime number because it is at equal distance from previous prime (195299107) and next prime (195299191).

It is a cyclic number.

It is not a de Polignac number, because 195299149 - 2¹³ = 195290957 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 (195299549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344769 + ... + 345334.

It is an arithmetic number, because the mean of its divisors is an integer number (48997384).

Almost surely, 2^195299149 is an apocalyptic number.

It is an amenable number.

195299149 is a deficient number, since it is larger than the sum of its proper divisors (690387).

195299149 is an equidigital number, since it uses as much as digits as its factorization.

195299149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690386.

The product of its digits is 262440, while the sum is 49.

The square root of 195299149 is about 13974.9471913135. The cubic root of 195299149 is about 580.1853836651.

It can be divided in two parts, 1952 and 99149, that added together give a palindrome (101101).

The spelling of 195299149 in words is "one hundred ninety-five million, two hundred ninety-nine thousand, one hundred forty-nine".