124021693 has 2 divisors, whose sum is σ = 124021694. Its totient is φ = 124021692.

The previous prime is 124021663. The next prime is 124021739. The reversal of 124021693 is 396120421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104898564 + 19123129 = 10242^2 + 4373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124021693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124021663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62010846 + 62010847.

It is an arithmetic number, because the mean of its divisors is an integer number (62010847).

Almost surely, 2^124021693 is an apocalyptic number.

It is an amenable number.

124021693 is a deficient number, since it is larger than the sum of its proper divisors (1).

124021693 is an equidigital number, since it uses as much as digits as its factorization.

124021693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 124021693 is about 11136.5027275173. The cubic root of 124021693 is about 498.6921728254.

The spelling of 124021693 in words is "one hundred twenty-four million, twenty-one thousand, six hundred ninety-three".