1172237081 has 2 divisors, whose sum is σ = 1172237082. Its totient is φ = 1172237080.

The previous prime is 1172237039. The next prime is 1172237089. The reversal of 1172237081 is 1807322711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166905600 + 5331481 = 34160^2 + 2309^2 .

It is an emirp because it is prime and its reverse (1807322711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172237081 is a prime.

It is a super-4 number, since 4×1172237081⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1172237089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586118540 + 586118541.

It is an arithmetic number, because the mean of its divisors is an integer number (586118541).

Almost surely, 2^1172237081 is an apocalyptic number.

It is an amenable number.

1172237081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172237081 is an equidigital number, since it uses as much as digits as its factorization.

1172237081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 1172237081 is about 34237.9479671314. The cubic root of 1172237081 is about 1054.3994038922.

Adding to 1172237081 its reverse (1807322711), we get a palindrome (2979559792).

The spelling of 1172237081 in words is "one billion, one hundred seventy-two million, two hundred thirty-seven thousand, eighty-one".