124401689 has 2 divisors, whose sum is σ = 124401690. Its totient is φ = 124401688.

The previous prime is 124401679. The next prime is 124401701. The reversal of 124401689 is 986104421.

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., 81721600 + 42680089 = 9040^2 + 6533^2 .

It is a cyclic number.

It is not a de Polignac number, because 124401689 - 2¹⁶ = 124336153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124401679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62200844 + 62200845.

It is an arithmetic number, because the mean of its divisors is an integer number (62200845).

Almost surely, 2^124401689 is an apocalyptic number.

It is an amenable number.

124401689 is a deficient number, since it is larger than the sum of its proper divisors (1).

124401689 is an equidigital number, since it uses as much as digits as its factorization.

124401689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 124401689 is about 11153.5505109360. The cubic root of 124401689 is about 499.2009758008.

The spelling of 124401689 in words is "one hundred twenty-four million, four hundred one thousand, six hundred eighty-nine".