196478657 has 2 divisors, whose sum is σ = 196478658. Its totient is φ = 196478656.

The previous prime is 196478629. The next prime is 196478663. The reversal of 196478657 is 756874691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196252081 + 226576 = 14009^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 196478657 - 2²² = 192284353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196478599 and 196478608.

It is not a weakly prime, because it can be changed into another prime (196472657) 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 as a sum of consecutive naturals, namely, 98239328 + 98239329.

It is an arithmetic number, because the mean of its divisors is an integer number (98239329).

Almost surely, 2^196478657 is an apocalyptic number.

It is an amenable number.

196478657 is a deficient number, since it is larger than the sum of its proper divisors (1).

196478657 is an equidigital number, since it uses as much as digits as its factorization.

196478657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 196478657 is about 14017.0844686047. The cubic root of 196478657 is about 581.3510488057.

The spelling of 196478657 in words is "one hundred ninety-six million, four hundred seventy-eight thousand, six hundred fifty-seven".