123487841 has 2 divisors, whose sum is σ = 123487842. Its totient is φ = 123487840.

The previous prime is 123487831. The next prime is 123487843. The reversal of 123487841 is 148784321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122323600 + 1164241 = 11060^2 + 1079^2 .

It is a cyclic number.

It is not a de Polignac number, because 123487841 - 2¹⁴ = 123471457 is a prime.

Together with 123487843, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123487795 and 123487804.

It is not a weakly prime, because it can be changed into another prime (123487843) 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, 61743920 + 61743921.

It is an arithmetic number, because the mean of its divisors is an integer number (61743921).

Almost surely, 2^123487841 is an apocalyptic number.

It is an amenable number.

123487841 is a deficient number, since it is larger than the sum of its proper divisors (1).

123487841 is an equidigital number, since it uses as much as digits as its factorization.

123487841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 38.

The square root of 123487841 is about 11112.5083127078. The cubic root of 123487841 is about 497.9756026929.

The spelling of 123487841 in words is "one hundred twenty-three million, four hundred eighty-seven thousand, eight hundred forty-one".