1243893673 has 6 divisors (see below), whose sum is σ = 1367255162. Its totient is φ = 1130812320.

The previous prime is 1243893671. The next prime is 1243893683. The reversal of 1243893673 is 3763983421.

It can be written as a sum of positive squares in only one way, i.e., 775733904 + 468159769 = 27852^2 + 21637^2 .

It is not a de Polignac number, because 1243893673 - 2¹ = 1243893671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243893671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5139936 + ... + 5140177.

Almost surely, 2^1243893673 is an apocalyptic number.

It is an amenable number.

1243893673 is a deficient number, since it is larger than the sum of its proper divisors (123361489).

1243893673 is a wasteful number, since it uses less digits than its factorization.

1243893673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10280135 (or 10280124 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 1243893673 is about 35268.8768321306. The cubic root of 1243893673 is about 1075.4603899290.

It can be divided in two parts, 1243 and 893673, that added together give a square (894916 = 946²).

The spelling of 1243893673 in words is "one billion, two hundred forty-three million, eight hundred ninety-three thousand, six hundred seventy-three".