169091139 has 8 divisors (see below), whose sum is σ = 257662720. Its totient is φ = 96623496.

The previous prime is 169091123. The next prime is 169091177. The reversal of 169091139 is 931190961.

It is a happy number.

169091139 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 169091139 - 2⁴ = 169091123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169091097 and 169091106.

It is not an unprimeable number, because it can be changed into a prime (169091119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4025959 + ... + 4026000.

It is an arithmetic number, because the mean of its divisors is an integer number (32207840).

Almost surely, 2^169091139 is an apocalyptic number.

169091139 is a deficient number, since it is larger than the sum of its proper divisors (88571581).

169091139 is an equidigital number, since it uses as much as digits as its factorization.

169091139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8051969.

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 169091139 is about 13003.5048736869. The cubic root of 169091139 is about 552.9768495051.

It can be divided in two parts, 1690 and 91139, that added together give a palindrome (92829).

The spelling of 169091139 in words is "one hundred sixty-nine million, ninety-one thousand, one hundred thirty-nine".