124387639 has 4 divisors (see below), whose sum is σ = 125528920. Its totient is φ = 123246360.

The previous prime is 124387619. The next prime is 124387649. The reversal of 124387639 is 936783421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124387639 - 2⁷ = 124387511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124387595 and 124387604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124387619) 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 in 3 ways as a sum of consecutive naturals, for example, 570477 + ... + 570694.

It is an arithmetic number, because the mean of its divisors is an integer number (31382230).

Almost surely, 2^124387639 is an apocalyptic number.

124387639 is a deficient number, since it is larger than the sum of its proper divisors (1141281).

124387639 is a wasteful number, since it uses less digits than its factorization.

124387639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141280.

The product of its digits is 217728, while the sum is 43.

The square root of 124387639 is about 11152.9206488704. The cubic root of 124387639 is about 499.1821817426.

The spelling of 124387639 in words is "one hundred twenty-four million, three hundred eighty-seven thousand, six hundred thirty-nine".