128092047931 has 4 divisors (see below), whose sum is σ = 131216244264. Its totient is φ = 124967851600.

The previous prime is 128092047911. The next prime is 128092047943. The reversal of 128092047931 is 139740290821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139740290821 = 1171 ⋅119334151.

It is a cyclic number.

It is not a de Polignac number, because 128092047931 - 2¹⁷ = 128091916859 is a prime.

It is a super-2 number, since 2×128092047931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128092047911) 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, 1562098105 + ... + 1562098186.

It is an arithmetic number, because the mean of its divisors is an integer number (32804061066).

Almost surely, 2^128092047931 is an apocalyptic number.

128092047931 is a deficient number, since it is larger than the sum of its proper divisors (3124196333).

128092047931 is an equidigital number, since it uses as much as digits as its factorization.

128092047931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124196332.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 128092047931 in words is "one hundred twenty-eight billion, ninety-two million, forty-seven thousand, nine hundred thirty-one".