124223639 has 2 divisors, whose sum is σ = 124223640. Its totient is φ = 124223638.

The previous prime is 124223609. The next prime is 124223647. The reversal of 124223639 is 936322421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124223639 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124223609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62111819 + 62111820.

It is an arithmetic number, because the mean of its divisors is an integer number (62111820).

Almost surely, 2^124223639 is an apocalyptic number.

124223639 is a deficient number, since it is larger than the sum of its proper divisors (1).

124223639 is an equidigital number, since it uses as much as digits as its factorization.

124223639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 124223639 is about 11145.5658896262. The cubic root of 124223639 is about 498.9627015119.

It can be divided in two parts, 12422 and 3639, that added together give a palindrome (16061).

The spelling of 124223639 in words is "one hundred twenty-four million, two hundred twenty-three thousand, six hundred thirty-nine".