123487843 has 2 divisors, whose sum is σ = 123487844. Its totient is φ = 123487842.

The previous prime is 123487841. The next prime is 123487867. The reversal of 123487843 is 348784321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123487843 - 2¹ = 123487841 is a prime.

Together with 123487841, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 123487796 and 123487805.

It is not a weakly prime, because it can be changed into another prime (123487841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61743921 + 61743922.

It is an arithmetic number, because the mean of its divisors is an integer number (61743922).

Almost surely, 2^123487843 is an apocalyptic number.

123487843 is a deficient number, since it is larger than the sum of its proper divisors (1).

123487843 is an equidigital number, since it uses as much as digits as its factorization.

123487843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 40.

The square root of 123487843 is about 11112.5084026965. The cubic root of 123487843 is about 497.9756053813.

The spelling of 123487843 in words is "one hundred twenty-three million, four hundred eighty-seven thousand, eight hundred forty-three".