544639913 has 2 divisors, whose sum is σ = 544639914. Its totient is φ = 544639912.

The previous prime is 544639891. The next prime is 544639969. The reversal of 544639913 is 319936445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 496933264 + 47706649 = 22292^2 + 6907^2 .

It is a cyclic number.

It is not a de Polignac number, because 544639913 - 2¹⁰ = 544638889 is a prime.

It is equal to p_28578707 and since 544639913 and 28578707 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (544639213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272319956 + 272319957.

It is an arithmetic number, because the mean of its divisors is an integer number (272319957).

Almost surely, 2^544639913 is an apocalyptic number.

It is an amenable number.

544639913 is a deficient number, since it is larger than the sum of its proper divisors (1).

544639913 is an equidigital number, since it uses as much as digits as its factorization.

544639913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 544639913 is about 23337.5215693526. The cubic root of 544639913 is about 816.6509812527.

The spelling of 544639913 in words is "five hundred forty-four million, six hundred thirty-nine thousand, nine hundred thirteen".