123424729 has 2 divisors, whose sum is σ = 123424730. Its totient is φ = 123424728.

The previous prime is 123424681. The next prime is 123424747. The reversal of 123424729 is 927424321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83229129 + 40195600 = 9123^2 + 6340^2 .

It is a cyclic number.

It is not a de Polignac number, because 123424729 - 2¹³ = 123416537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123424694 and 123424703.

It is not a weakly prime, because it can be changed into another prime (123424789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61712364 + 61712365.

It is an arithmetic number, because the mean of its divisors is an integer number (61712365).

Almost surely, 2^123424729 is an apocalyptic number.

It is an amenable number.

123424729 is a deficient number, since it is larger than the sum of its proper divisors (1).

123424729 is an equidigital number, since it uses as much as digits as its factorization.

123424729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 123424729 is about 11109.6682668746. The cubic root of 123424729 is about 497.8907533355.

It can be divided in two parts, 12342 and 4729, that added together give a palindrome (17071).

The spelling of 123424729 in words is "one hundred twenty-three million, four hundred twenty-four thousand, seven hundred twenty-nine".