23129291 has 2 divisors, whose sum is σ = 23129292. Its totient is φ = 23129290.

The previous prime is 23129273. The next prime is 23129339. The reversal of 23129291 is 19292132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23129291 - 2²² = 18934987 is a prime.

It is not a weakly prime, because it can be changed into another prime (23129201) 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, 11564645 + 11564646.

It is an arithmetic number, because the mean of its divisors is an integer number (11564646).

Almost surely, 2^23129291 is an apocalyptic number.

23129291 is a deficient number, since it is larger than the sum of its proper divisors (1).

23129291 is an equidigital number, since it uses as much as digits as its factorization.

23129291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 23129291 is about 4809.2921516581. The cubic root of 23129291 is about 284.9185814415.

The spelling of 23129291 in words is "twenty-three million, one hundred twenty-nine thousand, two hundred ninety-one".