10030991 has 2 divisors, whose sum is σ = 10030992. Its totient is φ = 10030990.

The previous prime is 10030987. The next prime is 10031027. The reversal of 10030991 is 19903001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10030991 - 2² = 10030987 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10038991) 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, 5015495 + 5015496.

It is an arithmetic number, because the mean of its divisors is an integer number (5015496).

Almost surely, 2^10030991 is an apocalyptic number.

10030991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10030991 is an equidigital number, since it uses as much as digits as its factorization.

10030991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 10030991 is about 3167.1739769075. The cubic root of 10030991 is about 215.6657997710.

Adding to 10030991 its reverse (19903001), we get a palindrome (29933992).

The spelling of 10030991 in words is "ten million, thirty thousand, nine hundred ninety-one".