128311137 has 12 divisors (see below), whose sum is σ = 185445520. Its totient is φ = 85491288.

The previous prime is 128311103. The next prime is 128311147. The reversal of 128311137 is 731113821.

It is a happy number.

It is not a de Polignac number, because 128311137 - 2¹⁹ = 127786849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128311137.

It is not an unprimeable number, because it can be changed into a prime (128311147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19314 + ... + 25092.

Almost surely, 2^128311137 is an apocalyptic number.

It is an amenable number.

128311137 is a deficient number, since it is larger than the sum of its proper divisors (57134383).

128311137 is a wasteful number, since it uses less digits than its factorization.

128311137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252 (or 8249 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 128311137 is about 11327.4505957872. The cubic root of 128311137 is about 504.3764312688.

Adding to 128311137 its reverse (731113821), we get a palindrome (859424958).

The spelling of 128311137 in words is "one hundred twenty-eight million, three hundred eleven thousand, one hundred thirty-seven".