1155005477 has 2 divisors, whose sum is σ = 1155005478. Its totient is φ = 1155005476.

The previous prime is 1155005473. The next prime is 1155005479. The reversal of 1155005477 is 7745005511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1054885441 + 100120036 = 32479^2 + 10006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155005477 - 2² = 1155005473 is a prime.

Together with 1155005479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155005473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577502738 + 577502739.

It is an arithmetic number, because the mean of its divisors is an integer number (577502739).

Almost surely, 2^1155005477 is an apocalyptic number.

It is an amenable number.

1155005477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155005477 is an equidigital number, since it uses as much as digits as its factorization.

1155005477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24500, while the sum is 35.

The square root of 1155005477 is about 33985.3715148150. The cubic root of 1155005477 is about 1049.2074070012.

The spelling of 1155005477 in words is "one billion, one hundred fifty-five million, five thousand, four hundred seventy-seven".