10409691 has 16 divisors (see below), whose sum is σ = 14358528. Its totient is φ = 6703200.

The previous prime is 10409689. The next prime is 10409699. The reversal of 10409691 is 19690401.

10409691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10409691 - 2¹ = 10409689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10409699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20956 + ... + 21446.

It is an arithmetic number, because the mean of its divisors is an integer number (897408).

Almost surely, 2^10409691 is an apocalyptic number.

10409691 is a deficient number, since it is larger than the sum of its proper divisors (3948837).

10409691 is a wasteful number, since it uses less digits than its factorization.

10409691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 10409691 is about 3226.4052752250. The cubic root of 10409691 is about 218.3463548489.

It can be divided in two parts, 1040 and 9691, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 10409691 in words is "ten million, four hundred nine thousand, six hundred ninety-one".