545969 has 4 divisors (see below), whose sum is σ = 552960. Its totient is φ = 538980.

The previous prime is 545959. The next prime is 546001. The reversal of 545969 is 969545.

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 a de Polignac number, because none of the positive numbers 2^k-545969 is a prime.

It is a super-2 number, since 2×545969² = 596164297922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545929) 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, 3377 + ... + 3534.

It is an arithmetic number, because the mean of its divisors is an integer number (138240).

2⁵⁴⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

545969 is a deficient number, since it is larger than the sum of its proper divisors (6991).

545969 is an equidigital number, since it uses as much as digits as its factorization.

545969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6990.

The product of its digits is 48600, while the sum is 38.

The square root of 545969 is about 738.8971511652. The cubic root of 545969 is about 81.7314733865.

The spelling of 545969 in words is "five hundred forty-five thousand, nine hundred sixty-nine".