124783877809 has 2 divisors, whose sum is σ = 124783877810. Its totient is φ = 124783877808.

The previous prime is 124783877807. The next prime is 124783877837. The reversal of 124783877809 is 908778387421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111809984400 + 12973893409 = 334380^2 + 113903^2 .

It is an emirp because it is prime and its reverse (908778387421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124783877809 - 2¹ = 124783877807 is a prime.

It is a super-2 number, since 2×124783877809² (a number of 23 digits) contains 22 as substring.

Together with 124783877807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (124783877807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62391938904 + 62391938905.

It is an arithmetic number, because the mean of its divisors is an integer number (62391938905).

Almost surely, 2^124783877809 is an apocalyptic number.

It is an amenable number.

124783877809 is a deficient number, since it is larger than the sum of its proper divisors (1).

124783877809 is an equidigital number, since it uses as much as digits as its factorization.

124783877809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 124783877809 in words is "one hundred twenty-four billion, seven hundred eighty-three million, eight hundred seventy-seven thousand, eight hundred nine".