10023991 has 2 divisors, whose sum is σ = 10023992. Its totient is φ = 10023990.

The previous prime is 10023953. The next prime is 10024009. The reversal of 10023991 is 19932001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10023991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10023901) 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, 5011995 + 5011996.

It is an arithmetic number, because the mean of its divisors is an integer number (5011996).

Almost surely, 2^10023991 is an apocalyptic number.

10023991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10023991 is an equidigital number, since it uses as much as digits as its factorization.

10023991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 10023991 is about 3166.0686979281. The cubic root of 10023991 is about 215.6156215483.

Adding to 10023991 its reverse (19932001), we get a palindrome (29955992).

The spelling of 10023991 in words is "ten million, twenty-three thousand, nine hundred ninety-one".