196771857 has 16 divisors (see below), whose sum is σ = 266407680. Its totient is φ = 129168000.

The previous prime is 196771853. The next prime is 196771879. The reversal of 196771857 is 758177691.

It is not a de Polignac number, because 196771857 - 2² = 196771853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196771853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108357 + ... + 110157.

It is an arithmetic number, because the mean of its divisors is an integer number (16650480).

Almost surely, 2^196771857 is an apocalyptic number.

It is an amenable number.

196771857 is a deficient number, since it is larger than the sum of its proper divisors (69635823).

196771857 is a wasteful number, since it uses less digits than its factorization.

196771857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344.

The product of its digits is 740880, while the sum is 51.

The square root of 196771857 is about 14027.5392353755. The cubic root of 196771857 is about 581.6400834405.

The spelling of 196771857 in words is "one hundred ninety-six million, seven hundred seventy-one thousand, eight hundred fifty-seven".