545078993 has 4 divisors (see below), whose sum is σ = 554317680. Its totient is φ = 535840308.

The previous prime is 545078971. The next prime is 545079013. The reversal of 545078993 is 399870545.

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 545078993 - 2⁶ = 545078929 is a prime.

It is a super-2 number, since 2×545078993² = 594222217219788098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (545078903) 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, 4619255 + ... + 4619372.

It is an arithmetic number, because the mean of its divisors is an integer number (138579420).

Almost surely, 2^545078993 is an apocalyptic number.

It is an amenable number.

545078993 is a deficient number, since it is larger than the sum of its proper divisors (9238687).

545078993 is an equidigital number, since it uses as much as digits as its factorization.

545078993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9238686.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 545078993 is about 23346.9268427346. The cubic root of 545078993 is about 816.8703792980.

The spelling of 545078993 in words is "five hundred forty-five million, seventy-eight thousand, nine hundred ninety-three".