124989387 has 4 divisors (see below), whose sum is σ = 166652520. Its totient is φ = 83326256.

The previous prime is 124989379. The next prime is 124989407. The reversal of 124989387 is 783989421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783989421 = 3 ⋅261329807.

It is a cyclic number.

It is not a de Polignac number, because 124989387 - 2³ = 124989379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124989307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20831562 + ... + 20831567.

It is an arithmetic number, because the mean of its divisors is an integer number (41663130).

Almost surely, 2^124989387 is an apocalyptic number.

124989387 is a deficient number, since it is larger than the sum of its proper divisors (41663133).

124989387 is an equidigital number, since it uses as much as digits as its factorization.

124989387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41663132.

The product of its digits is 870912, while the sum is 51.

The square root of 124989387 is about 11179.8652496352. The cubic root of 124989387 is about 499.9858489328.

The spelling of 124989387 in words is "one hundred twenty-four million, nine hundred eighty-nine thousand, three hundred eighty-seven".