196791877 has 4 divisors (see below), whose sum is σ = 196931020. Its totient is φ = 196652736.

The previous prime is 196791857. The next prime is 196791913. The reversal of 196791877 is 778197691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 778197691 = 709 ⋅1097599.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 176730436 = 4479^2 + 13294^2 .

It is a cyclic number.

It is not a de Polignac number, because 196791877 - 2¹⁵ = 196759109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196791857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67428 + ... + 70285.

It is an arithmetic number, because the mean of its divisors is an integer number (49232755).

Almost surely, 2^196791877 is an apocalyptic number.

It is an amenable number.

196791877 is a deficient number, since it is larger than the sum of its proper divisors (139143).

196791877 is a wasteful number, since it uses less digits than its factorization.

196791877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139142.

The product of its digits is 1333584, while the sum is 55.

The square root of 196791877 is about 14028.2528135189. The cubic root of 196791877 is about 581.6598085505.

The spelling of 196791877 in words is "one hundred ninety-six million, seven hundred ninety-one thousand, eight hundred seventy-seven".