124421993 has 2 divisors, whose sum is σ = 124421994. Its totient is φ = 124421992.

The previous prime is 124421989. The next prime is 124422007. The reversal of 124421993 is 399124421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69839449 + 54582544 = 8357^2 + 7388^2 .

It is an emirp because it is prime and its reverse (399124421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124421993 - 2² = 124421989 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124421933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62210996 + 62210997.

It is an arithmetic number, because the mean of its divisors is an integer number (62210997).

Almost surely, 2^124421993 is an apocalyptic number.

It is an amenable number.

124421993 is a deficient number, since it is larger than the sum of its proper divisors (1).

124421993 is an equidigital number, since it uses as much as digits as its factorization.

124421993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 124421993 is about 11154.4606772358. The cubic root of 124421993 is about 499.2281330560.

The spelling of 124421993 in words is "one hundred twenty-four million, four hundred twenty-one thousand, nine hundred ninety-three".