1373803243 has 2 divisors, whose sum is σ = 1373803244. Its totient is φ = 1373803242.

The previous prime is 1373803241. The next prime is 1373803247. The reversal of 1373803243 is 3423083731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1373803243 - 2¹ = 1373803241 is a prime.

Together with 1373803241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1373803199 and 1373803208.

It is not a weakly prime, because it can be changed into another prime (1373803241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686901621 + 686901622.

It is an arithmetic number, because the mean of its divisors is an integer number (686901622).

Almost surely, 2^1373803243 is an apocalyptic number.

1373803243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373803243 is an equidigital number, since it uses as much as digits as its factorization.

1373803243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 1373803243 is about 37064.8518545535. The cubic root of 1373803243 is about 1111.6673378549.

Adding to 1373803243 its reverse (3423083731), we get a palindrome (4796886974).

The spelling of 1373803243 in words is "one billion, three hundred seventy-three million, eight hundred three thousand, two hundred forty-three".