23993539 has 2 divisors, whose sum is σ = 23993540. Its totient is φ = 23993538.

The previous prime is 23993537. The next prime is 23993581. The reversal of 23993539 is 93539932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23993539 - 2¹ = 23993537 is a prime.

Together with 23993537, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23993495 and 23993504.

It is not a weakly prime, because it can be changed into another prime (23993533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11996769 + 11996770.

It is an arithmetic number, because the mean of its divisors is an integer number (11996770).

Almost surely, 2^23993539 is an apocalyptic number.

23993539 is a deficient number, since it is larger than the sum of its proper divisors (1).

23993539 is an equidigital number, since it uses as much as digits as its factorization.

23993539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196830, while the sum is 43.

The square root of 23993539 is about 4898.3200181287. The cubic root of 23993539 is about 288.4240273648.

The spelling of 23993539 in words is "twenty-three million, nine hundred ninety-three thousand, five hundred thirty-nine".