545047994 has 4 divisors (see below), whose sum is σ = 817571994. Its totient is φ = 272523996.

The previous prime is 545047991. The next prime is 545048027. The reversal of 545047994 is 499740545.

545047994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499740545 = 5 ⋅99948109.

It can be written as a sum of positive squares in only one way, i.e., 531994225 + 13053769 = 23065^2 + 3613^2 .

It is not an unprimeable number, because it can be changed into a prime (545047991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136261997 + ... + 136262000.

Almost surely, 2^545047994 is an apocalyptic number.

545047994 is a deficient number, since it is larger than the sum of its proper divisors (272524000).

545047994 is a wasteful number, since it uses less digits than its factorization.

545047994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272523999.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 545047994 is about 23346.2629557709. The cubic root of 545047994 is about 816.8548936862.

The spelling of 545047994 in words is "five hundred forty-five million, forty-seven thousand, nine hundred ninety-four".