124640687 has 2 divisors, whose sum is σ = 124640688. Its totient is φ = 124640686.

The previous prime is 124640623. The next prime is 124640689. The reversal of 124640687 is 786046421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 124640687 - 2⁶ = 124640623 is a prime.

Together with 124640689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124640687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124640689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62320343 + 62320344.

It is an arithmetic number, because the mean of its divisors is an integer number (62320344).

Almost surely, 2^124640687 is an apocalyptic number.

124640687 is a deficient number, since it is larger than the sum of its proper divisors (1).

124640687 is an equidigital number, since it uses as much as digits as its factorization.

124640687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 124640687 is about 11164.2593574316. The cubic root of 124640687 is about 499.5204562226.

The spelling of 124640687 in words is "one hundred twenty-four million, six hundred forty thousand, six hundred eighty-seven".