130728523 has 2 divisors, whose sum is σ = 130728524. Its totient is φ = 130728522.

The previous prime is 130728509. The next prime is 130728547. The reversal of 130728523 is 325827031.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130728523 is a prime.

It is not a weakly prime, because it can be changed into another prime (130728583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65364261 + 65364262.

It is an arithmetic number, because the mean of its divisors is an integer number (65364262).

Almost surely, 2^130728523 is an apocalyptic number.

130728523 is a deficient number, since it is larger than the sum of its proper divisors (1).

130728523 is an equidigital number, since it uses as much as digits as its factorization.

130728523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 130728523 is about 11433.6574638215. The cubic root of 130728523 is about 507.5242344870.

The spelling of 130728523 in words is "one hundred thirty million, seven hundred twenty-eight thousand, five hundred twenty-three".