169448138 has 4 divisors (see below), whose sum is σ = 254172210. Its totient is φ = 84724068.

The previous prime is 169448101. The next prime is 169448141. The reversal of 169448138 is 831844961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831844961 = 29 ⋅28684309.

It can be written as a sum of positive squares in only one way, i.e., 104919049 + 64529089 = 10243^2 + 8033^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42362033 + ... + 42362036.

Almost surely, 2^169448138 is an apocalyptic number.

169448138 is a deficient number, since it is larger than the sum of its proper divisors (84724072).

169448138 is an equidigital number, since it uses as much as digits as its factorization.

169448138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84724071.

The product of its digits is 165888, while the sum is 44.

The square root of 169448138 is about 13017.2246658034. The cubic root of 169448138 is about 553.3657392192.

The spelling of 169448138 in words is "one hundred sixty-nine million, four hundred forty-eight thousand, one hundred thirty-eight".