493740912889 has 27 divisors (see below), whose sum is σ = 590511893517. Its totient is φ = 411616707264.

The previous prime is 493740912869. The next prime is 493740913007. The reversal of 493740912889 is 988219047394.

The square root of 493740912889 is 702667.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 402040960489 + 91699952400 = 634067^2 + 302820^2 .

It is not a de Polignac number, because 493740912889 - 2⁵ = 493740912857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493740912889.

It is not an unprimeable number, because it can be changed into a prime (493740912809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 181989397 + ... + 181992109.

It is an arithmetic number, because the mean of its divisors is an integer number (21870810871).

Almost surely, 2^493740912889 is an apocalyptic number.

493740912889 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

493740912889 is the 702667-th square number.

493740912889 is the 351334-th centered octagonal number.

It is an amenable number.

493740912889 is a deficient number, since it is larger than the sum of its proper divisors (96770980628).

493740912889 is an frugal number, since it uses more digits than its factorization.

493740912889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

Multiplying 493740912889 by its sum of digits (64), we get a square (31599418424896 = 5621336²).

The spelling of 493740912889 in words is "four hundred ninety-three billion, seven hundred forty million, nine hundred twelve thousand, eight hundred eighty-nine".