169904942 has 8 divisors (see below), whose sum is σ = 255531000. Its totient is φ = 84727944.

The previous prime is 169904923. The next prime is 169904951. The reversal of 169904942 is 249409961.

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

It is a junction number, because it is equal to n+sod(n) for n = 169904893 and 169904902.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 111317 + ... + 112832.

It is an arithmetic number, because the mean of its divisors is an integer number (31941375).

Almost surely, 2^169904942 is an apocalyptic number.

169904942 is a deficient number, since it is larger than the sum of its proper divisors (85626058).

169904942 is a wasteful number, since it uses less digits than its factorization.

169904942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224530.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 169904942 is about 13034.7589927854. The cubic root of 169904942 is about 553.8625537117.

The spelling of 169904942 in words is "one hundred sixty-nine million, nine hundred four thousand, nine hundred forty-two".