196399771 has 8 divisors (see below), whose sum is σ = 199022400. Its totient is φ = 193786560.

The previous prime is 196399747. The next prime is 196399781. The reversal of 196399771 is 177993691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196399771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196399781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46110 + ... + 50188.

It is an arithmetic number, because the mean of its divisors is an integer number (24877800).

Almost surely, 2^196399771 is an apocalyptic number.

196399771 is a deficient number, since it is larger than the sum of its proper divisors (2622629).

196399771 is an equidigital number, since it uses as much as digits as its factorization.

196399771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709.

The product of its digits is 642978, while the sum is 52.

The square root of 196399771 is about 14014.2702628428. The cubic root of 196399771 is about 581.2732344202.

The spelling of 196399771 in words is "one hundred ninety-six million, three hundred ninety-nine thousand, seven hundred seventy-one".