1129820177 has 2 divisors, whose sum is σ = 1129820178. Its totient is φ = 1129820176.

The previous prime is 1129820147. The next prime is 1129820179. The reversal of 1129820177 is 7710289211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1129228816 + 591361 = 33604^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129820177 - 2⁶ = 1129820113 is a prime.

It is a super-2 number, since 2×1129820177² = 2552987264712622658, which contains 22 as substring.

Together with 1129820179, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1129820177.

It is not a weakly prime, because it can be changed into another prime (1129820179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564910088 + 564910089.

It is an arithmetic number, because the mean of its divisors is an integer number (564910089).

Almost surely, 2^1129820177 is an apocalyptic number.

It is an amenable number.

1129820177 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129820177 is an equidigital number, since it uses as much as digits as its factorization.

1129820177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 1129820177 is about 33612.7978157130. The cubic root of 1129820177 is about 1041.5251836030.

It can be divided in two parts, 112 and 9820177, that added together give a palindrome (9820289).

The spelling of 1129820177 in words is "one billion, one hundred twenty-nine million, eight hundred twenty thousand, one hundred seventy-seven".