23081491 has 2 divisors, whose sum is σ = 23081492. Its totient is φ = 23081490.

The previous prime is 23081431. The next prime is 23081519. The reversal of 23081491 is 19418032.

It is a happy number.

It is an a-pointer prime, because the next prime (23081519) can be obtained adding 23081491 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23081491 - 2¹⁹ = 22557203 is a prime.

It is equal to p_1453078 and since 23081491 and 1453078 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23081431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11540745 + 11540746.

It is an arithmetic number, because the mean of its divisors is an integer number (11540746).

Almost surely, 2^23081491 is an apocalyptic number.

23081491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23081491 is an equidigital number, since it uses as much as digits as its factorization.

23081491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 23081491 is about 4804.3200351350. The cubic root of 23081491 is about 284.7221710266.

The spelling of 23081491 in words is "twenty-three million, eighty-one thousand, four hundred ninety-one".