23135947 has 2 divisors, whose sum is σ = 23135948. Its totient is φ = 23135946.

The previous prime is 23135933. The next prime is 23135993. The reversal of 23135947 is 74953132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23135947 - 2¹¹ = 23133899 is a prime.

It is not a weakly prime, because it can be changed into another prime (23135927) by changing a digit.

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, 11567973 + 11567974.

It is an arithmetic number, because the mean of its divisors is an integer number (11567974).

Almost surely, 2^23135947 is an apocalyptic number.

23135947 is a deficient number, since it is larger than the sum of its proper divisors (1).

23135947 is an equidigital number, since it uses as much as digits as its factorization.

23135947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 23135947 is about 4809.9840956078. The cubic root of 23135947 is about 284.9459095049.

The spelling of 23135947 in words is "twenty-three million, one hundred thirty-five thousand, nine hundred forty-seven".