128520023 has 2 divisors, whose sum is σ = 128520024. Its totient is φ = 128520022.

The previous prime is 128520019. The next prime is 128520061. The reversal of 128520023 is 320025821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128520023 - 2² = 128520019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128720023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64260011 + 64260012.

It is an arithmetic number, because the mean of its divisors is an integer number (64260012).

Almost surely, 2^128520023 is an apocalyptic number.

128520023 is a deficient number, since it is larger than the sum of its proper divisors (1).

128520023 is an equidigital number, since it uses as much as digits as its factorization.

128520023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 128520023 is about 11336.6671910222. The cubic root of 128520023 is about 504.6499852167.

Adding to 128520023 its reverse (320025821), we get a palindrome (448545844).

The spelling of 128520023 in words is "one hundred twenty-eight million, five hundred twenty thousand, twenty-three".