169121394 has 48 divisors (see below), whose sum is σ = 415396800. Its totient is φ = 49297248.

The previous prime is 169121371. The next prime is 169121411. The reversal of 169121394 is 493121961.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14574 + ... + 23465.

It is an arithmetic number, because the mean of its divisors is an integer number (8654100).

Almost surely, 2^169121394 is an apocalyptic number.

169121394 is an abundant number, since it is smaller than the sum of its proper divisors (246275406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169121394 is a wasteful number, since it uses less digits than its factorization.

169121394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38079 (or 38076 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 169121394 is about 13004.6681618563. The cubic root of 169121394 is about 553.0098284002.

The spelling of 169121394 in words is "one hundred sixty-nine million, one hundred twenty-one thousand, three hundred ninety-four".