169078009 has 3 divisors (see below), whose sum is σ = 169091013. Its totient is φ = 169065006.

The previous prime is 169077983. The next prime is 169078043. The reversal of 169078009 is 900870961.

The square root of 169078009 is 13003.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 169078009 - 2⁵ = 169077977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169078079) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6502 + ... + 19504.

It is an arithmetic number, because the mean of its divisors is an integer number (56363671).

Almost surely, 2^169078009 is an apocalyptic number.

169078009 is the 13003-rd square number.

169078009 is the 6502-nd centered octagonal number.

It is an amenable number.

169078009 is a deficient number, since it is larger than the sum of its proper divisors (13004).

169078009 is an frugal number, since it uses more digits than its factorization.

169078009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26006 (or 13003 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The cubic root of 169078009 is about 552.9625361708.

The spelling of 169078009 in words is "one hundred sixty-nine million, seventy-eight thousand, nine".