545678789 has 4 divisors (see below), whose sum is σ = 557289024. Its totient is φ = 534068556.

The previous prime is 545678773. The next prime is 545678821. The reversal of 545678789 is 987876545.

It is a happy number.

545678789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 545678789 - 2⁴ = 545678773 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545678719) 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, 5805047 + ... + 5805140.

It is an arithmetic number, because the mean of its divisors is an integer number (139322256).

Almost surely, 2^545678789 is an apocalyptic number.

It is an amenable number.

545678789 is a deficient number, since it is larger than the sum of its proper divisors (11610235).

545678789 is a wasteful number, since it uses less digits than its factorization.

545678789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11610234.

The product of its digits is 16934400, while the sum is 59.

The square root of 545678789 is about 23359.7685990251. The cubic root of 545678789 is about 817.1698930620.

The spelling of 545678789 in words is "five hundred forty-five million, six hundred seventy-eight thousand, seven hundred eighty-nine".