196889731 has 4 divisors (see below), whose sum is σ = 198632232. Its totient is φ = 195147232.

The previous prime is 196889713. The next prime is 196889783. The reversal of 196889731 is 137988691.

It is a happy number.

196889731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 196889731 - 2⁹ = 196889219 is a prime.

It is a super-2 number, since 2×196889731² = 77531132346504722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196889701) 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, 871081 + ... + 871306.

It is an arithmetic number, because the mean of its divisors is an integer number (49658058).

Almost surely, 2^196889731 is an apocalyptic number.

196889731 is a deficient number, since it is larger than the sum of its proper divisors (1742501).

196889731 is a wasteful number, since it uses less digits than its factorization.

196889731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742500.

The product of its digits is 653184, while the sum is 52.

The square root of 196889731 is about 14031.7401272971. The cubic root of 196889731 is about 581.7562019389.

The spelling of 196889731 in words is "one hundred ninety-six million, eight hundred eighty-nine thousand, seven hundred thirty-one".