123940863 has 12 divisors (see below), whose sum is σ = 189556848. Its totient is φ = 77766720.

The previous prime is 123940847. The next prime is 123940889. The reversal of 123940863 is 368049321.

It is not a de Polignac number, because 123940863 - 2⁴ = 123940847 is a prime.

It is a super-2 number, since 2×123940863² = 30722675042369538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123940823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404883 + ... + 405188.

It is an arithmetic number, because the mean of its divisors is an integer number (15796404).

Almost surely, 2^123940863 is an apocalyptic number.

123940863 is a deficient number, since it is larger than the sum of its proper divisors (65615985).

123940863 is a wasteful number, since it uses less digits than its factorization.

123940863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810094 (or 810091 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 123940863 is about 11132.8730793089. The cubic root of 123940863 is about 498.5838099318.

The spelling of 123940863 in words is "one hundred twenty-three million, nine hundred forty thousand, eight hundred sixty-three".