124000287781 has 2 divisors, whose sum is σ = 124000287782. Its totient is φ = 124000287780.

The previous prime is 124000287637. The next prime is 124000287833. The reversal of 124000287781 is 187782000421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116209401025 + 7790886756 = 340895^2 + 88266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124000287781 is a prime.

It is a super-2 number, since 2×124000287781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124000287881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62000143890 + 62000143891.

It is an arithmetic number, because the mean of its divisors is an integer number (62000143891).

Almost surely, 2^124000287781 is an apocalyptic number.

It is an amenable number.

124000287781 is a deficient number, since it is larger than the sum of its proper divisors (1).

124000287781 is an equidigital number, since it uses as much as digits as its factorization.

124000287781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The spelling of 124000287781 in words is "one hundred twenty-four billion, two hundred eighty-seven thousand, seven hundred eighty-one".