544687491 has 4 divisors (see below), whose sum is σ = 726249992. Its totient is φ = 363124992.

The previous prime is 544687487. The next prime is 544687511. The reversal of 544687491 is 194786445.

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

It is not a de Polignac number, because 544687491 - 2² = 544687487 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 544687491.

It is not an unprimeable number, because it can be changed into a prime (544687411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90781246 + ... + 90781251.

It is an arithmetic number, because the mean of its divisors is an integer number (181562498).

Almost surely, 2^544687491 is an apocalyptic number.

544687491 is a deficient number, since it is larger than the sum of its proper divisors (181562501).

544687491 is a wasteful number, since it uses less digits than its factorization.

544687491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181562500.

The product of its digits is 967680, while the sum is 48.

The square root of 544687491 is about 23338.5408926951. The cubic root of 544687491 is about 816.6747605658.

The spelling of 544687491 in words is "five hundred forty-four million, six hundred eighty-seven thousand, four hundred ninety-one".