124961813 has 2 divisors, whose sum is σ = 124961814. Its totient is φ = 124961812.

The previous prime is 124961801. The next prime is 124961819. The reversal of 124961813 is 318169421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89832484 + 35129329 = 9478^2 + 5927^2 .

It is a cyclic number.

It is not a de Polignac number, because 124961813 - 2¹⁸ = 124699669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124961819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62480906 + 62480907.

It is an arithmetic number, because the mean of its divisors is an integer number (62480907).

Almost surely, 2^124961813 is an apocalyptic number.

It is an amenable number.

124961813 is a deficient number, since it is larger than the sum of its proper divisors (1).

124961813 is an equidigital number, since it uses as much as digits as its factorization.

124961813 is an odious number, because the sum of its binary digits is odd.

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

The square root of 124961813 is about 11178.6319824923. The cubic root of 124961813 is about 499.9490788142.

The spelling of 124961813 in words is "one hundred twenty-four million, nine hundred sixty-one thousand, eight hundred thirteen".