124566991 has 2 divisors, whose sum is σ = 124566992. Its totient is φ = 124566990.

The previous prime is 124566989. The next prime is 124567031. The reversal of 124566991 is 199665421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124566991 - 2¹ = 124566989 is a prime.

Together with 124566989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124566961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62283495 + 62283496.

It is an arithmetic number, because the mean of its divisors is an integer number (62283496).

Almost surely, 2^124566991 is an apocalyptic number.

124566991 is a deficient number, since it is larger than the sum of its proper divisors (1).

124566991 is an equidigital number, since it uses as much as digits as its factorization.

124566991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 124566991 is about 11160.9583369888. The cubic root of 124566991 is about 499.4219867255.

The spelling of 124566991 in words is "one hundred twenty-four million, five hundred sixty-six thousand, nine hundred ninety-one".