123398629 has 2 divisors, whose sum is σ = 123398630. Its totient is φ = 123398628.

The previous prime is 123398617. The next prime is 123398659. The reversal of 123398629 is 926893321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73017025 + 50381604 = 8545^2 + 7098^2 .

It is a cyclic number.

It is not a de Polignac number, because 123398629 - 2⁹ = 123398117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123398659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61699314 + 61699315.

It is an arithmetic number, because the mean of its divisors is an integer number (61699315).

Almost surely, 2^123398629 is an apocalyptic number.

It is an amenable number.

123398629 is a deficient number, since it is larger than the sum of its proper divisors (1).

123398629 is an equidigital number, since it uses as much as digits as its factorization.

123398629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 123398629 is about 11108.4935522329. The cubic root of 123398629 is about 497.8556553859.

The spelling of 123398629 in words is "one hundred twenty-three million, three hundred ninety-eight thousand, six hundred twenty-nine".