121723623 has 12 divisors (see below), whose sum is σ = 200940688. Its totient is φ = 69556320.

The previous prime is 121723619. The next prime is 121723663. The reversal of 121723623 is 326327121.

121723623 is a `hidden beast` number, since 1 + 2 + 17 + 23 + 623 = 666.

It is not a de Polignac number, because 121723623 - 2² = 121723619 is a prime.

It is a super-2 number, since 2×121723623² = 29633280792492258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121723603) 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, 965998 + ... + 966123.

Almost surely, 2^121723623 is an apocalyptic number.

121723623 is a deficient number, since it is larger than the sum of its proper divisors (79217065).

121723623 is a wasteful number, since it uses less digits than its factorization.

121723623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932134 (or 1932131 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 121723623 is about 11032.8429246500. The cubic root of 121723623 is about 495.5927640152.

The spelling of 121723623 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, six hundred twenty-three".