124000391 has 2 divisors, whose sum is σ = 124000392. Its totient is φ = 124000390.

The previous prime is 124000367. The next prime is 124000411. The reversal of 124000391 is 193000421.

It is an a-pointer prime, because the next prime (124000411) can be obtained adding 124000391 to its sum of digits (20).

It is a strong prime.

It is an emirp because it is prime and its reverse (193000421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124000391 - 2¹⁸ = 123738247 is a 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 (124000321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62000195 + 62000196.

It is an arithmetic number, because the mean of its divisors is an integer number (62000196).

Almost surely, 2^124000391 is an apocalyptic number.

124000391 is a deficient number, since it is larger than the sum of its proper divisors (1).

124000391 is an equidigital number, since it uses as much as digits as its factorization.

124000391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 124000391 is about 11135.5462820645. The cubic root of 124000391 is about 498.6636193558.

The spelling of 124000391 in words is "one hundred twenty-four million, three hundred ninety-one", and thus it is an aban number.