1163506243 has 2 divisors, whose sum is σ = 1163506244. Its totient is φ = 1163506242.

The previous prime is 1163506219. The next prime is 1163506247. The reversal of 1163506243 is 3426053611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1163506243 - 2¹³ = 1163498051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1163506247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581753121 + 581753122.

It is an arithmetic number, because the mean of its divisors is an integer number (581753122).

Almost surely, 2^1163506243 is an apocalyptic number.

1163506243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163506243 is an equidigital number, since it uses as much as digits as its factorization.

1163506243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1163506243 is about 34110.2073139405. The cubic root of 1163506243 is about 1051.7751507940.

Adding to 1163506243 its reverse (3426053611), we get a palindrome (4589559854).

The spelling of 1163506243 in words is "one billion, one hundred sixty-three million, five hundred six thousand, two hundred forty-three".