128883931949 has 8 divisors (see below), whose sum is σ = 131908087872. Its totient is φ = 125860996800.

The previous prime is 128883931927. The next prime is 128883931951. The reversal of 128883931949 is 949139388821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128883931949 is a prime.

It is a super-2 number, since 2×128883931949² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128883931999) 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 7 ways as a sum of consecutive naturals, for example, 89804 + ... + 515589.

It is an arithmetic number, because the mean of its divisors is an integer number (16488510984).

Almost surely, 2^128883931949 is an apocalyptic number.

It is an amenable number.

128883931949 is a deficient number, since it is larger than the sum of its proper divisors (3024155923).

128883931949 is an equidigital number, since it uses as much as digits as its factorization.

128883931949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610387.

The product of its digits is 26873856, while the sum is 65.

The spelling of 128883931949 in words is "one hundred twenty-eight billion, eight hundred eighty-three million, nine hundred thirty-one thousand, nine hundred forty-nine".