128654739 has 12 divisors (see below), whose sum is σ = 188188000. Its totient is φ = 84683664.

The previous prime is 128654711. The next prime is 128654741. The reversal of 128654739 is 937456821.

It is not a de Polignac number, because 128654739 - 2⁷ = 128654611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128654694 and 128654703.

It is not an unprimeable number, because it can be changed into a prime (128654789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89764 + ... + 91185.

Almost surely, 2^128654739 is an apocalyptic number.

128654739 is a deficient number, since it is larger than the sum of its proper divisors (59533261).

128654739 is a wasteful number, since it uses less digits than its factorization.

128654739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181034 (or 181031 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 128654739 is about 11342.6072399603. The cubic root of 128654739 is about 504.8262500655.

The spelling of 128654739 in words is "one hundred twenty-eight million, six hundred fifty-four thousand, seven hundred thirty-nine".