123995881 has 8 divisors (see below), whose sum is σ = 130625280. Its totient is φ = 117376848.

The previous prime is 123995873. The next prime is 123995897. The reversal of 123995881 is 188599321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123995881 - 2³ = 123995873 is a prime.

It is a super-2 number, since 2×123995881² = 30749957009932322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123995581) 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 in 7 ways as a sum of consecutive naturals, for example, 40455 + ... + 43411.

It is an arithmetic number, because the mean of its divisors is an integer number (16328160).

Almost surely, 2^123995881 is an apocalyptic number.

It is an amenable number.

123995881 is a deficient number, since it is larger than the sum of its proper divisors (6629399).

123995881 is a wasteful number, since it uses less digits than its factorization.

123995881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its digits is 155520, while the sum is 46.

The square root of 123995881 is about 11135.3437755644. The cubic root of 123995881 is about 498.6575736754.

It can be divided in two parts, 123 and 995881, that added together give a square (996004 = 998²).

The spelling of 123995881 in words is "one hundred twenty-three million, nine hundred ninety-five thousand, eight hundred eighty-one".