169189900929 has 45 divisors (see below), whose sum is σ = 294049256787. Its totient is φ = 96665135616.

The previous prime is 169189900849. The next prime is 169189900931. The reversal of 169189900929 is 929009981961.

The square root of 169189900929 is 411327.

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

It can be written as a sum of positive squares in only one way, i.e., 14646566529 + 154543334400 = 121023^2 + 393120^2 .

It is not a de Polignac number, because 169189900929 - 2²¹ = 169187803777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (169189900939) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 25910337 + ... + 25916865.

Almost surely, 2^169189900929 is an apocalyptic number.

169189900929 is the 411327-th square number.

169189900929 is the 205664-th centered octagonal number.

It is an amenable number.

169189900929 is a deficient number, since it is larger than the sum of its proper divisors (124859355858).

169189900929 is an frugal number, since it uses more digits than its factorization.

169189900929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13084 (or 6539 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 63.

The spelling of 169189900929 in words is "one hundred sixty-nine billion, one hundred eighty-nine million, nine hundred thousand, nine hundred twenty-nine".