123863851 has 2 divisors, whose sum is σ = 123863852. Its totient is φ = 123863850.

The previous prime is 123863837. The next prime is 123863867. The reversal of 123863851 is 158368321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123863851 - 2¹⁷ = 123732779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123863851.

It is not a weakly prime, because it can be changed into another prime (123863821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61931925 + 61931926.

It is an arithmetic number, because the mean of its divisors is an integer number (61931926).

Almost surely, 2^123863851 is an apocalyptic number.

123863851 is a deficient number, since it is larger than the sum of its proper divisors (1).

123863851 is an equidigital number, since it uses as much as digits as its factorization.

123863851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 123863851 is about 11129.4137761160. The cubic root of 123863851 is about 498.4805217157.

The spelling of 123863851 in words is "one hundred twenty-three million, eight hundred sixty-three thousand, eight hundred fifty-one".