23123491 has 2 divisors, whose sum is σ = 23123492. Its totient is φ = 23123490.

The previous prime is 23123479. The next prime is 23123497. The reversal of 23123491 is 19432132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23123491 - 2⁷ = 23123363 is a prime.

It is not a weakly prime, because it can be changed into another prime (23123497) 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, 11561745 + 11561746.

It is an arithmetic number, because the mean of its divisors is an integer number (11561746).

Almost surely, 2^23123491 is an apocalyptic number.

23123491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123491 is an equidigital number, since it uses as much as digits as its factorization.

23123491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 23123491 is about 4808.6891145093. The cubic root of 23123491 is about 284.8947636496.

The spelling of 23123491 in words is "twenty-three million, one hundred twenty-three thousand, four hundred ninety-one".