10431991 has 2 divisors, whose sum is σ = 10431992. Its totient is φ = 10431990.

The previous prime is 10431973. The next prime is 10432001. The reversal of 10431991 is 19913401.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10431991 - 2⁹ = 10431479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10431901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5215995 + 5215996.

It is an arithmetic number, because the mean of its divisors is an integer number (5215996).

Almost surely, 2^10431991 is an apocalyptic number.

10431991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10431991 is an equidigital number, since it uses as much as digits as its factorization.

10431991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 10431991 is about 3229.8592848606. The cubic root of 10431991 is about 218.5021600151.

The spelling of 10431991 in words is "ten million, four hundred thirty-one thousand, nine hundred ninety-one".