23687533 has 2 divisors, whose sum is σ = 23687534. Its totient is φ = 23687532.

The previous prime is 23687473. The next prime is 23687557. The reversal of 23687533 is 33578632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 7382089 = 4038^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 23687533 - 2⁹ = 23687021 is a prime.

It is a super-2 number, since 2×23687533² = 1122198439252178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23687492 and 23687501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23687633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11843766 + 11843767.

It is an arithmetic number, because the mean of its divisors is an integer number (11843767).

Almost surely, 2^23687533 is an apocalyptic number.

It is an amenable number.

23687533 is a deficient number, since it is larger than the sum of its proper divisors (1).

23687533 is an equidigital number, since it uses as much as digits as its factorization.

23687533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 23687533 is about 4866.9839736740. The cubic root of 23687533 is about 287.1926212015.

The spelling of 23687533 in words is "twenty-three million, six hundred eighty-seven thousand, five hundred thirty-three".