1337945573 has 4 divisors (see below), whose sum is σ = 1338114540. Its totient is φ = 1337776608.

The previous prime is 1337945561. The next prime is 1337945593. The reversal of 1337945573 is 3755497331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3755497331 = 11587 ⋅324113.

It can be written as a sum of positive squares in 2 ways, for example, as 170903329 + 1167042244 = 13073^2 + 34162^2 .

It is a cyclic number.

It is not a de Polignac number, because 1337945573 - 2⁸ = 1337945317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1337945503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71990 + ... + 88647.

It is an arithmetic number, because the mean of its divisors is an integer number (334528635).

Almost surely, 2^1337945573 is an apocalyptic number.

It is an amenable number.

1337945573 is a deficient number, since it is larger than the sum of its proper divisors (168967).

1337945573 is an equidigital number, since it uses as much as digits as its factorization.

1337945573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168966.

The product of its digits is 1190700, while the sum is 47.

The square root of 1337945573 is about 36577.9383371999. The cubic root of 1337945573 is about 1101.9100624008.

The spelling of 1337945573 in words is "one billion, three hundred thirty-seven million, nine hundred forty-five thousand, five hundred seventy-three".