545219923 has 4 divisors (see below), whose sum is σ = 564020640. Its totient is φ = 526419208.

The previous prime is 545219911. The next prime is 545219929. The reversal of 545219923 is 329912545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545219923 is a prime.

It is a super-2 number, since 2×545219923² = 594529528872251858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545219929) 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, 9400315 + ... + 9400372.

It is an arithmetic number, because the mean of its divisors is an integer number (141005160).

Almost surely, 2^545219923 is an apocalyptic number.

545219923 is a deficient number, since it is larger than the sum of its proper divisors (18800717).

545219923 is a wasteful number, since it uses less digits than its factorization.

545219923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18800716.

The product of its digits is 97200, while the sum is 40.

The square root of 545219923 is about 23349.9448179219. The cubic root of 545219923 is about 816.9407737569.

The spelling of 545219923 in words is "five hundred forty-five million, two hundred nineteen thousand, nine hundred twenty-three".