196347781 has 4 divisors (see below), whose sum is σ = 224397472. Its totient is φ = 168298092.

The previous prime is 196347779. The next prime is 196347839. The reversal of 196347781 is 187743691.

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.

It is a cyclic number.

It is not a de Polignac number, because 196347781 - 2¹ = 196347779 is a prime.

It is a super-2 number, since 2×196347781² = 77104902207247922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196347181) 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, 14024835 + ... + 14024848.

It is an arithmetic number, because the mean of its divisors is an integer number (56099368).

Almost surely, 2^196347781 is an apocalyptic number.

It is an amenable number.

196347781 is a deficient number, since it is larger than the sum of its proper divisors (28049691).

196347781 is an equidigital number, since it uses as much as digits as its factorization.

196347781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28049690.

The product of its digits is 254016, while the sum is 46.

The square root of 196347781 is about 14012.4152450604. The cubic root of 196347781 is about 581.2219392782.

The spelling of 196347781 in words is "one hundred ninety-six million, three hundred forty-seven thousand, seven hundred eighty-one".