124441991 has 2 divisors, whose sum is σ = 124441992. Its totient is φ = 124441990.

The previous prime is 124441949. The next prime is 124442047. The reversal of 124441991 is 199144421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124441991 - 2⁶ = 124441927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124441391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62220995 + 62220996.

It is an arithmetic number, because the mean of its divisors is an integer number (62220996).

Almost surely, 2^124441991 is an apocalyptic number.

124441991 is a deficient number, since it is larger than the sum of its proper divisors (1).

124441991 is an equidigital number, since it uses as much as digits as its factorization.

124441991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 124441991 is about 11155.3570539002. The cubic root of 124441991 is about 499.2548781384.

The spelling of 124441991 in words is "one hundred twenty-four million, four hundred forty-one thousand, nine hundred ninety-one".