23121673 has 2 divisors, whose sum is σ = 23121674. Its totient is φ = 23121672.

The previous prime is 23121667. The next prime is 23121719. The reversal of 23121673 is 37612132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 7463824 = 3957^2 + 2732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23121673 is a prime.

It is a super-2 number, since 2×23121673² = 1069223524637858, which contains 22 as substring.

It is the 4809-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (23121643) by changing a digit.

It is a nontrivial repunit in base 4808.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560836 + 11560837.

It is an arithmetic number, because the mean of its divisors is an integer number (11560837).

Almost surely, 2^23121673 is an apocalyptic number.

It is an amenable number.

23121673 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121673 is an equidigital number, since it uses as much as digits as its factorization.

23121673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 23121673 is about 4808.5000779869. The cubic root of 23121673 is about 284.8872971839.

It can be divided in two parts, 231 and 21673, that added together give a square (21904 = 148²).

The spelling of 23121673 in words is "twenty-three million, one hundred twenty-one thousand, six hundred seventy-three".