124638074989 has 2 divisors, whose sum is σ = 124638074990. Its totient is φ = 124638074988.

The previous prime is 124638074983. The next prime is 124638075011. The reversal of 124638074989 is 989470836421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74488055625 + 50150019364 = 272925^2 + 223942^2 .

It is a cyclic number.

It is not a de Polignac number, because 124638074989 - 2¹³ = 124638066797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124638074983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62319037494 + 62319037495.

It is an arithmetic number, because the mean of its divisors is an integer number (62319037495).

Almost surely, 2^124638074989 is an apocalyptic number.

It is an amenable number.

124638074989 is a deficient number, since it is larger than the sum of its proper divisors (1).

124638074989 is an equidigital number, since it uses as much as digits as its factorization.

124638074989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 124638074989 in words is "one hundred twenty-four billion, six hundred thirty-eight million, seventy-four thousand, nine hundred eighty-nine".