1163431273 has 2 divisors, whose sum is σ = 1163431274. Its totient is φ = 1163431272.

The previous prime is 1163431253. The next prime is 1163431277. The reversal of 1163431273 is 3721343611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 803835904 + 359595369 = 28352^2 + 18963^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163431273 - 2⁹ = 1163430761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1163431277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581715636 + 581715637.

It is an arithmetic number, because the mean of its divisors is an integer number (581715637).

Almost surely, 2^1163431273 is an apocalyptic number.

It is an amenable number.

1163431273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163431273 is an equidigital number, since it uses as much as digits as its factorization.

1163431273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 1163431273 is about 34109.1083583256. The cubic root of 1163431273 is about 1051.7525600896.

Adding to 1163431273 its reverse (3721343611), we get a palindrome (4884774884).

The spelling of 1163431273 in words is "one billion, one hundred sixty-three million, four hundred thirty-one thousand, two hundred seventy-three".