545023891 has 8 divisors (see below), whose sum is σ = 562363200. Its totient is φ = 527923968.

The previous prime is 545023879. The next prime is 545023901. The reversal of 545023891 is 198320545.

545023891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 545023891 - 2⁷ = 545023763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545023891.

It is not an unprimeable number, because it can be changed into a prime (545023811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55216 + ... + 64333.

It is an arithmetic number, because the mean of its divisors is an integer number (70295400).

Almost surely, 2^545023891 is an apocalyptic number.

545023891 is a deficient number, since it is larger than the sum of its proper divisors (17339309).

545023891 is a wasteful number, since it uses less digits than its factorization.

545023891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119693.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 545023891 is about 23345.7467432507. The cubic root of 545023891 is about 816.8428525792.

The spelling of 545023891 in words is "five hundred forty-five million, twenty-three thousand, eight hundred ninety-one".