23947829 has 2 divisors, whose sum is σ = 23947830. Its totient is φ = 23947828.

The previous prime is 23947817. The next prime is 23947901. The reversal of 23947829 is 92874932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 1385329 = 4750^2 + 1177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23947829 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23947829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23947129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11973914 + 11973915.

It is an arithmetic number, because the mean of its divisors is an integer number (11973915).

Almost surely, 2^23947829 is an apocalyptic number.

It is an amenable number.

23947829 is a deficient number, since it is larger than the sum of its proper divisors (1).

23947829 is an equidigital number, since it uses as much as digits as its factorization.

23947829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 23947829 is about 4893.6519083400. The cubic root of 23947829 is about 288.2407524238.

The spelling of 23947829 in words is "twenty-three million, nine hundred forty-seven thousand, eight hundred twenty-nine".