196981390927 has 4 divisors (see below), whose sum is σ = 203335629376. Its totient is φ = 190627152480.

The previous prime is 196981390891. The next prime is 196981390943. The reversal of 196981390927 is 729093189691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 729093189691 = 37 ⋅19705221343.

It is a cyclic number.

It is not a de Polignac number, because 196981390927 - 2¹⁹ = 196980866639 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 (196981390997) 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, 3177119178 + ... + 3177119239.

It is an arithmetic number, because the mean of its divisors is an integer number (50833907344).

Almost surely, 2^196981390927 is an apocalyptic number.

196981390927 is a deficient number, since it is larger than the sum of its proper divisors (6354238449).

196981390927 is an equidigital number, since it uses as much as digits as its factorization.

196981390927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354238448.

The product of its (nonzero) digits is 13226976, while the sum is 64.

The spelling of 196981390927 in words is "one hundred ninety-six billion, nine hundred eighty-one million, three hundred ninety thousand, nine hundred twenty-seven".