124520989 has 2 divisors, whose sum is σ = 124520990. Its totient is φ = 124520988.

The previous prime is 124520969. The next prime is 124520993. The reversal of 124520989 is 989025421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80192025 + 44328964 = 8955^2 + 6658^2 .

It is a cyclic number.

It is not a de Polignac number, because 124520989 - 2⁷ = 124520861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124520969) 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, 62260494 + 62260495.

It is an arithmetic number, because the mean of its divisors is an integer number (62260495).

Almost surely, 2^124520989 is an apocalyptic number.

It is an amenable number.

124520989 is a deficient number, since it is larger than the sum of its proper divisors (1).

124520989 is an equidigital number, since it uses as much as digits as its factorization.

124520989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 124520989 is about 11158.8973021531. The cubic root of 124520989 is about 499.3605010977.

The spelling of 124520989 in words is "one hundred twenty-four million, five hundred twenty thousand, nine hundred eighty-nine".