169199042 has 4 divisors (see below), whose sum is σ = 253798566. Its totient is φ = 84599520.

The previous prime is 169199029. The next prime is 169199077. The reversal of 169199042 is 240991961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240991961 = 7 ⋅34427423.

It can be written as a sum of positive squares in only one way, i.e., 151314601 + 17884441 = 12301^2 + 4229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42299759 + ... + 42299762.

Almost surely, 2^169199042 is an apocalyptic number.

169199042 is a deficient number, since it is larger than the sum of its proper divisors (84599524).

169199042 is an equidigital number, since it uses as much as digits as its factorization.

169199042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84599523.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 169199042 is about 13007.6532087844. The cubic root of 169199042 is about 553.0944491494.

The spelling of 169199042 in words is "one hundred sixty-nine million, one hundred ninety-nine thousand, forty-two".