23706521 has 2 divisors, whose sum is σ = 23706522. Its totient is φ = 23706520.

The previous prime is 23706511. The next prime is 23706533. The reversal of 23706521 is 12560732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 1990921 = 4660^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 23706521 - 2⁶ = 23706457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23706511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11853260 + 11853261.

It is an arithmetic number, because the mean of its divisors is an integer number (11853261).

Almost surely, 2^23706521 is an apocalyptic number.

It is an amenable number.

23706521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23706521 is an equidigital number, since it uses as much as digits as its factorization.

23706521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 23706521 is about 4868.9342776423. The cubic root of 23706521 is about 287.2693388717.

The spelling of 23706521 in words is "twenty-three million, seven hundred six thousand, five hundred twenty-one".