196551749 has 4 divisors (see below), whose sum is σ = 202892160. Its totient is φ = 190211340.

The previous prime is 196551737. The next prime is 196551781. The reversal of 196551749 is 947155691.

196551749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 947155691 = 71 ⋅13340221.

It is a cyclic number.

It is not a de Polignac number, because 196551749 - 2⁸ = 196551493 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 (196551349) 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, 3170159 + ... + 3170220.

It is an arithmetic number, because the mean of its divisors is an integer number (50723040).

Almost surely, 2^196551749 is an apocalyptic number.

It is an amenable number.

196551749 is a deficient number, since it is larger than the sum of its proper divisors (6340411).

196551749 is an equidigital number, since it uses as much as digits as its factorization.

196551749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340410.

The product of its digits is 340200, while the sum is 47.

The square root of 196551749 is about 14019.6914730674. The cubic root of 196551749 is about 581.4231293112.

The spelling of 196551749 in words is "one hundred ninety-six million, five hundred fifty-one thousand, seven hundred forty-nine".