128698001 has 4 divisors (see below), whose sum is σ = 135471600. Its totient is φ = 121924404.

The previous prime is 128697977. The next prime is 128698013. The reversal of 128698001 is 100896821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128698001 - 2¹⁰ = 128696977 is a prime.

It is a super-2 number, since 2×128698001² = 33126350922792002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128698061) 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, 3386771 + ... + 3386808.

It is an arithmetic number, because the mean of its divisors is an integer number (33867900).

Almost surely, 2^128698001 is an apocalyptic number.

It is an amenable number.

128698001 is a deficient number, since it is larger than the sum of its proper divisors (6773599).

128698001 is an equidigital number, since it uses as much as digits as its factorization.

128698001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773598.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 128698001 is about 11344.5141367976. The cubic root of 128698001 is about 504.8828287449.

The spelling of 128698001 in words is "one hundred twenty-eight million, six hundred ninety-eight thousand, one".