123009529 has 2 divisors, whose sum is σ = 123009530. Its totient is φ = 123009528.

The previous prime is 123009511. The next prime is 123009547. The reversal of 123009529 is 925900321.

It is a balanced prime because it is at equal distance from previous prime (123009511) and next prime (123009547).

It can be written as a sum of positive squares in only one way, i.e., 70476025 + 52533504 = 8395^2 + 7248^2 .

It is a cyclic number.

It is not a de Polignac number, because 123009529 - 2⁹ = 123009017 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123009529.

It is not a weakly prime, because it can be changed into another prime (123006529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61504764 + 61504765.

It is an arithmetic number, because the mean of its divisors is an integer number (61504765).

Almost surely, 2^123009529 is an apocalyptic number.

It is an amenable number.

123009529 is a deficient number, since it is larger than the sum of its proper divisors (1).

123009529 is an equidigital number, since it uses as much as digits as its factorization.

123009529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 123009529 is about 11090.9660985867. The cubic root of 123009529 is about 497.3318256852.

The spelling of 123009529 in words is "one hundred twenty-three million, nine thousand, five hundred twenty-nine".