1231177153 has 2 divisors, whose sum is σ = 1231177154. Its totient is φ = 1231177152.

The previous prime is 1231177093. The next prime is 1231177187. The reversal of 1231177153 is 3517711321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1231167744 + 9409 = 35088^2 + 97^2 .

It is an emirp because it is prime and its reverse (3517711321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231177153 - 2²⁹ = 694306241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231171153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615588576 + 615588577.

It is an arithmetic number, because the mean of its divisors is an integer number (615588577).

Almost surely, 2^1231177153 is an apocalyptic number.

It is an amenable number.

1231177153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231177153 is an equidigital number, since it uses as much as digits as its factorization.

1231177153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410, while the sum is 31.

The square root of 1231177153 is about 35088.1340769212. The cubic root of 1231177153 is about 1071.7829629605.

Adding to 1231177153 its reverse (3517711321), we get a palindrome (4748888474).

The spelling of 1231177153 in words is "one billion, two hundred thirty-one million, one hundred seventy-seven thousand, one hundred fifty-three".