196851049 has 2 divisors, whose sum is σ = 196851050. Its totient is φ = 196851048.

The previous prime is 196851047. The next prime is 196851073. The reversal of 196851049 is 940158691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 12027024 = 13595^2 + 3468^2 .

It is a cyclic number.

It is not a de Polignac number, because 196851049 - 2¹ = 196851047 is a prime.

Together with 196851047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 196850996 and 196851014.

It is not a weakly prime, because it can be changed into another prime (196851047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98425524 + 98425525.

It is an arithmetic number, because the mean of its divisors is an integer number (98425525).

Almost surely, 2^196851049 is an apocalyptic number.

It is an amenable number.

196851049 is a deficient number, since it is larger than the sum of its proper divisors (1).

196851049 is an equidigital number, since it uses as much as digits as its factorization.

196851049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 196851049 is about 14030.3616845753. The cubic root of 196851049 is about 581.7181011414.

The spelling of 196851049 in words is "one hundred ninety-six million, eight hundred fifty-one thousand, forty-nine".