545572169 has 4 divisors (see below), whose sum is σ = 546666000. Its totient is φ = 544478340.

The previous prime is 545572127. The next prime is 545572187. The reversal of 545572169 is 961275545.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 545572169 - 2²⁰ = 544523593 is a prime.

It is a super-2 number, since 2×545572169² = 595297983174729122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545572369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546167 + ... + 547164.

It is an arithmetic number, because the mean of its divisors is an integer number (136666500).

Almost surely, 2^545572169 is an apocalyptic number.

It is an amenable number.

545572169 is a deficient number, since it is larger than the sum of its proper divisors (1093831).

545572169 is a wasteful number, since it uses less digits than its factorization.

545572169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093830.

The product of its digits is 378000, while the sum is 44.

The square root of 545572169 is about 23357.4863587673. The cubic root of 545572169 is about 817.1166674093.

The spelling of 545572169 in words is "five hundred forty-five million, five hundred seventy-two thousand, one hundred sixty-nine".