42893309449 has 9 divisors (see below), whose sum is σ = 43520869191. Its totient is φ = 42274680840.

The previous prime is 42893309411. The next prime is 42893309471. The reversal of 42893309449 is 94490339824.

The square root of 42893309449 is 207107.

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

It can be written as a sum of positive squares in only one way, i.e., 42834511225 + 58798224 = 206965^2 + 7668^2 .

It is not a de Polignac number, because 42893309449 - 2²¹ = 42891212297 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 42893309449.

It is not an unprimeable number, because it can be changed into a prime (42893309479) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14703139 + ... + 14706055.

Almost surely, 2^42893309449 is an apocalyptic number.

42893309449 is the 207107-th square number.

42893309449 is the 103554-th centered octagonal number.

It is an amenable number.

42893309449 is a deficient number, since it is larger than the sum of its proper divisors (627559742).

42893309449 is an frugal number, since it uses more digits than its factorization.

42893309449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5976 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 42893309449 in words is "forty-two billion, eight hundred ninety-three million, three hundred nine thousand, four hundred forty-nine".