123015863 has 2 divisors, whose sum is σ = 123015864. Its totient is φ = 123015862.

The previous prime is 123015857. The next prime is 123015881. The reversal of 123015863 is 368510321.

It is a weak prime.

It is an emirp because it is prime and its reverse (368510321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123015863 - 2¹⁶ = 122950327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123015163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61507931 + 61507932.

It is an arithmetic number, because the mean of its divisors is an integer number (61507932).

Almost surely, 2^123015863 is an apocalyptic number.

123015863 is a deficient number, since it is larger than the sum of its proper divisors (1).

123015863 is an equidigital number, since it uses as much as digits as its factorization.

123015863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 123015863 is about 11091.2516426236. The cubic root of 123015863 is about 497.3403617331.

The spelling of 123015863 in words is "one hundred twenty-three million, fifteen thousand, eight hundred sixty-three".