123547889 has 2 divisors, whose sum is σ = 123547890. Its totient is φ = 123547888.

The previous prime is 123547877. The next prime is 123547939. The reversal of 123547889 is 988745321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112042225 + 11505664 = 10585^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 123547889 - 2²⁰ = 122499313 is a prime.

It is not a weakly prime, because it can be changed into another prime (123541889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61773944 + 61773945.

It is an arithmetic number, because the mean of its divisors is an integer number (61773945).

Almost surely, 2^123547889 is an apocalyptic number.

It is an amenable number.

123547889 is a deficient number, since it is larger than the sum of its proper divisors (1).

123547889 is an equidigital number, since it uses as much as digits as its factorization.

123547889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 123547889 is about 11115.2098045876. The cubic root of 123547889 is about 498.0563058974.

The spelling of 123547889 in words is "one hundred twenty-three million, five hundred forty-seven thousand, eight hundred eighty-nine".