123987633 has 16 divisors (see below), whose sum is σ = 206109696. Its totient is φ = 64409040.

The previous prime is 123987607. The next prime is 123987659. The reversal of 123987633 is 336789321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123987607) and next prime (123987659).

It is not a de Polignac number, because 123987633 - 2⁵ = 123987601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123187633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268141 + ... + 268602.

It is an arithmetic number, because the mean of its divisors is an integer number (12881856).

Almost surely, 2^123987633 is an apocalyptic number.

It is an amenable number.

123987633 is a deficient number, since it is larger than the sum of its proper divisors (82122063).

123987633 is a wasteful number, since it uses less digits than its factorization.

123987633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536764.

The product of its digits is 163296, while the sum is 42.

The square root of 123987633 is about 11134.9734171214. The cubic root of 123987633 is about 498.6465168058.

The spelling of 123987633 in words is "one hundred twenty-three million, nine hundred eighty-seven thousand, six hundred thirty-three".