197127959905 has 8 divisors (see below), whose sum is σ = 236642131584. Its totient is φ = 157643314800.

The previous prime is 197127959827. The next prime is 197127959939. The reversal of 197127959905 is 509959721791.

It is a happy number.

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

It is not a de Polignac number, because 197127959905 - 2⁹ = 197127959393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7366951 + ... + 7393660.

It is an arithmetic number, because the mean of its divisors is an integer number (29580266448).

Almost surely, 2^197127959905 is an apocalyptic number.

It is an amenable number.

197127959905 is a deficient number, since it is larger than the sum of its proper divisors (39514171679).

197127959905 is a wasteful number, since it uses less digits than its factorization.

197127959905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14763287.

The product of its (nonzero) digits is 16074450, while the sum is 64.

The spelling of 197127959905 in words is "one hundred ninety-seven billion, one hundred twenty-seven million, nine hundred fifty-nine thousand, nine hundred five".