10491139 has 2 divisors, whose sum is σ = 10491140. Its totient is φ = 10491138.

The previous prime is 10491137. The next prime is 10491149. The reversal of 10491139 is 93119401.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10491139 - 2¹ = 10491137 is a prime.

It is a super-2 number, since 2×10491139² = 220127995034642, which contains 22 as substring.

Together with 10491137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10491133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5245569 + 5245570.

It is an arithmetic number, because the mean of its divisors is an integer number (5245570).

Almost surely, 2^10491139 is an apocalyptic number.

10491139 is a deficient number, since it is larger than the sum of its proper divisors (1).

10491139 is an equidigital number, since it uses as much as digits as its factorization.

10491139 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 10491139 is about 3239.0027786342. The cubic root of 10491139 is about 218.9143413743.

The spelling of 10491139 in words is "ten million, four hundred ninety-one thousand, one hundred thirty-nine".