10302991 has 4 divisors (see below), whose sum is σ = 10345984. Its totient is φ = 10260000.

The previous prime is 10302989. The next prime is 10303043. The reversal of 10302991 is 19920301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10302991 - 2¹ = 10302989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10302191) 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 in 3 ways as a sum of consecutive naturals, for example, 21135 + ... + 21616.

It is an arithmetic number, because the mean of its divisors is an integer number (2586496).

Almost surely, 2^10302991 is an apocalyptic number.

10302991 is a deficient number, since it is larger than the sum of its proper divisors (42993).

10302991 is an equidigital number, since it uses as much as digits as its factorization.

10302991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42992.

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

The square root of 10302991 is about 3209.8272539188. The cubic root of 10302991 is about 217.5977699342.

The spelling of 10302991 in words is "ten million, three hundred two thousand, nine hundred ninety-one".