123467789 has 2 divisors, whose sum is σ = 123467790. Its totient is φ = 123467788.

The previous prime is 123467777. The next prime is 123467791. The reversal of 123467789 is 987764321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95218564 + 28249225 = 9758^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 123467789 - 2¹² = 123463693 is a prime.

Together with 123467791, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123467089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61733894 + 61733895.

It is an arithmetic number, because the mean of its divisors is an integer number (61733895).

Almost surely, 2^123467789 is an apocalyptic number.

It is an amenable number.

123467789 is a deficient number, since it is larger than the sum of its proper divisors (1).

123467789 is an equidigital number, since it uses as much as digits as its factorization.

123467789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 123467789 is about 11111.6060495322. The cubic root of 123467789 is about 497.9486474147.

The spelling of 123467789 in words is "one hundred twenty-three million, four hundred sixty-seven thousand, seven hundred eighty-nine".