10640491 has 2 divisors, whose sum is σ = 10640492. Its totient is φ = 10640490.

The previous prime is 10640489. The next prime is 10640501. The reversal of 10640491 is 19404601.

10640491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10640491 - 2¹ = 10640489 is a prime.

It is a super-2 number, since 2×10640491² = 226440097442162, which contains 22 as substring.

Together with 10640489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10649491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5320245 + 5320246.

It is an arithmetic number, because the mean of its divisors is an integer number (5320246).

Almost surely, 2^10640491 is an apocalyptic number.

10640491 is a deficient number, since it is larger than the sum of its proper divisors (1).

10640491 is an equidigital number, since it uses as much as digits as its factorization.

10640491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 10640491 is about 3261.9765480457. The cubic root of 10640491 is about 219.9482729627.

The spelling of 10640491 in words is "ten million, six hundred forty thousand, four hundred ninety-one".