128239097 has 8 divisors (see below), whose sum is σ = 147101952. Its totient is φ = 109512000.

The previous prime is 128239093. The next prime is 128239117. The reversal of 128239097 is 790932821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128239097 - 2² = 128239093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128239091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31904 + ... + 35697.

It is an arithmetic number, because the mean of its divisors is an integer number (18387744).

Almost surely, 2^128239097 is an apocalyptic number.

It is an amenable number.

128239097 is a deficient number, since it is larger than the sum of its proper divisors (18862855).

128239097 is an equidigital number, since it uses as much as digits as its factorization.

128239097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67879.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 128239097 is about 11324.2702634651. The cubic root of 128239097 is about 504.2820199256.

The spelling of 128239097 in words is "one hundred twenty-eight million, two hundred thirty-nine thousand, ninety-seven".