169253138 has 4 divisors (see below), whose sum is σ = 253879710. Its totient is φ = 84626568.

The previous prime is 169253089. The next prime is 169253153. The reversal of 169253138 is 831352961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 27952369 = 11887^2 + 5287^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42313283 + ... + 42313286.

Almost surely, 2^169253138 is an apocalyptic number.

169253138 is a deficient number, since it is larger than the sum of its proper divisors (84626572).

169253138 is an equidigital number, since it uses as much as digits as its factorization.

169253138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84626571.

The product of its digits is 38880, while the sum is 38.

The square root of 169253138 is about 13009.7324338358. The cubic root of 169253138 is about 553.1533876415.

The spelling of 169253138 in words is "one hundred sixty-nine million, two hundred fifty-three thousand, one hundred thirty-eight".