10491869 has 2 divisors, whose sum is σ = 10491870. Its totient is φ = 10491868.

The previous prime is 10491853. The next prime is 10491913. The reversal of 10491869 is 96819401.

It is a happy number.

10491869 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 can be written as a sum of positive squares in only one way, i.e., 10484644 + 7225 = 3238^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 10491869 - 2⁴ = 10491853 is a prime.

It is a super-2 number, since 2×10491869² = 220158630226322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10491809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5245934 + 5245935.

It is an arithmetic number, because the mean of its divisors is an integer number (5245935).

Almost surely, 2^10491869 is an apocalyptic number.

It is an amenable number.

10491869 is a deficient number, since it is larger than the sum of its proper divisors (1).

10491869 is an equidigital number, since it uses as much as digits as its factorization.

10491869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 10491869 is about 3239.1154656789. The cubic root of 10491869 is about 218.9194187945.

The spelling of 10491869 in words is "ten million, four hundred ninety-one thousand, eight hundred sixty-nine".