128923315 has 4 divisors (see below), whose sum is σ = 154707984. Its totient is φ = 103138648.

The previous prime is 128923313. The next prime is 128923351. The reversal of 128923315 is 513329821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128923315 - 2¹ = 128923313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128923313) 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, 12892327 + ... + 12892336.

It is an arithmetic number, because the mean of its divisors is an integer number (38676996).

Almost surely, 2^128923315 is an apocalyptic number.

128923315 is a deficient number, since it is larger than the sum of its proper divisors (25784669).

128923315 is an equidigital number, since it uses as much as digits as its factorization.

128923315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25784668.

The product of its digits is 12960, while the sum is 34.

The square root of 128923315 is about 11354.4403208613. The cubic root of 128923315 is about 505.1772929109.

The spelling of 128923315 in words is "one hundred twenty-eight million, nine hundred twenty-three thousand, three hundred fifteen".