23191969 has 2 divisors, whose sum is σ = 23191970. Its totient is φ = 23191968.

The previous prime is 23191963. The next prime is 23191997. The reversal of 23191969 is 96919132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23184225 + 7744 = 4815^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 23191969 - 2¹⁷ = 23060897 is a prime.

It is a super-2 number, since 2×23191969² = 1075734852193922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23191963) 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, 11595984 + 11595985.

It is an arithmetic number, because the mean of its divisors is an integer number (11595985).

Almost surely, 2^23191969 is an apocalyptic number.

It is an amenable number.

23191969 is a deficient number, since it is larger than the sum of its proper divisors (1).

23191969 is an equidigital number, since it uses as much as digits as its factorization.

23191969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 23191969 is about 4815.8040865467. The cubic root of 23191969 is about 285.1757159967.

The spelling of 23191969 in words is "twenty-three million, one hundred ninety-one thousand, nine hundred sixty-nine".