9161691 has 32 divisors (see below), whose sum is σ = 16132608. Its totient is φ = 4477440.

The previous prime is 9161689. The next prime is 9161693. The reversal of 9161691 is 1961619.

9161691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9161689) and next prime (9161693).

It is not a de Polignac number, because 9161691 - 2¹ = 9161689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

9161691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9161693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2761 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (504144).

Almost surely, 2^9161691 is an apocalyptic number.

9161691 is a deficient number, since it is larger than the sum of its proper divisors (6970917).

9161691 is a wasteful number, since it uses less digits than its factorization.

9161691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371.

The product of its digits is 2916, while the sum is 33.

The square root of 9161691 is about 3026.8285382558. The cubic root of 9161691 is about 209.2466658713.

The spelling of 9161691 in words is "nine million, one hundred sixty-one thousand, six hundred ninety-one".