124727891 has 2 divisors, whose sum is σ = 124727892. Its totient is φ = 124727890.

The previous prime is 124727887. The next prime is 124727899. The reversal of 124727891 is 198727421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124727891 - 2² = 124727887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124727899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62363945 + 62363946.

It is an arithmetic number, because the mean of its divisors is an integer number (62363946).

Almost surely, 2^124727891 is an apocalyptic number.

124727891 is a deficient number, since it is larger than the sum of its proper divisors (1).

124727891 is an equidigital number, since it uses as much as digits as its factorization.

124727891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 124727891 is about 11168.1641732202. The cubic root of 124727891 is about 499.6369244161.

The spelling of 124727891 in words is "one hundred twenty-four million, seven hundred twenty-seven thousand, eight hundred ninety-one".