124993889 has 4 divisors (see below), whose sum is σ = 125035524. Its totient is φ = 124952256.

The previous prime is 124993861. The next prime is 124993931. The reversal of 124993889 is 988399421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40960000 + 84033889 = 6400^2 + 9167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124993889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124993889.

It is not an unprimeable number, because it can be changed into a prime (124993849) 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, 15932 + ... + 22445.

It is an arithmetic number, because the mean of its divisors is an integer number (31258881).

Almost surely, 2^124993889 is an apocalyptic number.

It is an amenable number.

124993889 is a deficient number, since it is larger than the sum of its proper divisors (41635).

124993889 is an equidigital number, since it uses as much as digits as its factorization.

124993889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41634.

The product of its digits is 1119744, while the sum is 53.

The square root of 124993889 is about 11180.0665919305. The cubic root of 124993889 is about 499.9918518672.

The spelling of 124993889 in words is "one hundred twenty-four million, nine hundred ninety-three thousand, eight hundred eighty-nine".