128413917 has 40 divisors (see below), whose sum is σ = 198633600. Its totient is φ = 82627776.

The previous prime is 128413877. The next prime is 128413919. The reversal of 128413917 is 719314821.

It is a happy number.

It is not a de Polignac number, because 128413917 - 2⁸ = 128413661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128413919) 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 39 ways as a sum of consecutive naturals, for example, 338634 + ... + 339012.

It is an arithmetic number, because the mean of its divisors is an integer number (4965840).

Almost surely, 2^128413917 is an apocalyptic number.

It is an amenable number.

128413917 is a deficient number, since it is larger than the sum of its proper divisors (70219683).

128413917 is an equidigital number, since it uses as much as digits as its factorization.

128413917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 518 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 128413917 is about 11331.9864542806. The cubic root of 128413917 is about 504.5110674751.

The spelling of 128413917 in words is "one hundred twenty-eight million, four hundred thirteen thousand, nine hundred seventeen".