1773730243 has 2 divisors, whose sum is σ = 1773730244. Its totient is φ = 1773730242.

The previous prime is 1773730223. The next prime is 1773730247. The reversal of 1773730243 is 3420373771.

It is a strong prime.

It is an emirp because it is prime and its reverse (3420373771) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1773730243 is a prime.

It is a super-2 number, since 2×1773730243² = 6292237949865678098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1773730247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 886865121 + 886865122.

It is an arithmetic number, because the mean of its divisors is an integer number (886865122).

Almost surely, 2^1773730243 is an apocalyptic number.

1773730243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1773730243 is an equidigital number, since it uses as much as digits as its factorization.

1773730243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 37.

The square root of 1773730243 is about 42115.6769267692. The cubic root of 1773730243 is about 1210.4936726095.

The spelling of 1773730243 in words is "one billion, seven hundred seventy-three million, seven hundred thirty thousand, two hundred forty-three".