10645891 has 2 divisors, whose sum is σ = 10645892. Its totient is φ = 10645890.

The previous prime is 10645889. The next prime is 10645919. The reversal of 10645891 is 19854601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10645891 - 2¹ = 10645889 is a prime.

It is a super-2 number, since 2×10645891² = 226669990367762, which contains 22 as substring.

Together with 10645889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10645801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5322945 + 5322946.

It is an arithmetic number, because the mean of its divisors is an integer number (5322946).

Almost surely, 2^10645891 is an apocalyptic number.

10645891 is a deficient number, since it is larger than the sum of its proper divisors (1).

10645891 is an equidigital number, since it uses as much as digits as its factorization.

10645891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 10645891 is about 3262.8041620667. The cubic root of 10645891 is about 219.9854742476.

The spelling of 10645891 in words is "ten million, six hundred forty-five thousand, eight hundred ninety-one".