124343509 has 2 divisors, whose sum is σ = 124343510. Its totient is φ = 124343508.

The previous prime is 124343489. The next prime is 124343521. The reversal of 124343509 is 905343421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122102500 + 2241009 = 11050^2 + 1497^2 .

It is an emirp because it is prime and its reverse (905343421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124343509 - 2⁵ = 124343477 is a prime.

It is a super-2 number, since 2×124343509² = 30922616460866162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124343209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62171754 + 62171755.

It is an arithmetic number, because the mean of its divisors is an integer number (62171755).

Almost surely, 2^124343509 is an apocalyptic number.

It is an amenable number.

124343509 is a deficient number, since it is larger than the sum of its proper divisors (1).

124343509 is an equidigital number, since it uses as much as digits as its factorization.

124343509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 124343509 is about 11150.9420678255. The cubic root of 124343509 is about 499.1231418050.

The spelling of 124343509 in words is "one hundred twenty-four million, three hundred forty-three thousand, five hundred nine".