123019489 has 2 divisors, whose sum is σ = 123019490. Its totient is φ = 123019488.

The previous prime is 123019483. The next prime is 123019513. The reversal of 123019489 is 984910321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88679889 + 34339600 = 9417^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 123019489 - 2¹¹ = 123017441 is a prime.

It is a super-2 number, since 2×123019489² = 30267589347642242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123019483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61509744 + 61509745.

It is an arithmetic number, because the mean of its divisors is an integer number (61509745).

Almost surely, 2^123019489 is an apocalyptic number.

It is an amenable number.

123019489 is a deficient number, since it is larger than the sum of its proper divisors (1).

123019489 is an equidigital number, since it uses as much as digits as its factorization.

123019489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 123019489 is about 11091.4151035835. The cubic root of 123019489 is about 497.3452481990.

The spelling of 123019489 in words is "one hundred twenty-three million, nineteen thousand, four hundred eighty-nine".