169941091 has 4 divisors (see below), whose sum is σ = 169968672. Its totient is φ = 169913512.

The previous prime is 169941077. The next prime is 169941103. The reversal of 169941091 is 190149961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190149961 = 5653 ⋅33637.

It is a cyclic number.

It is not a de Polignac number, because 169941091 - 2¹⁷ = 169810019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169941001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150 + ... + 18436.

It is an arithmetic number, because the mean of its divisors is an integer number (42492168).

Almost surely, 2^169941091 is an apocalyptic number.

169941091 is a deficient number, since it is larger than the sum of its proper divisors (27581).

169941091 is an equidigital number, since it uses as much as digits as its factorization.

169941091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27580.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 169941091 is about 13036.1455576409. The cubic root of 169941091 is about 553.9018308853.

The spelling of 169941091 in words is "one hundred sixty-nine million, nine hundred forty-one thousand, ninety-one".