1155477149 has 2 divisors, whose sum is σ = 1155477150. Its totient is φ = 1155477148.

The previous prime is 1155477137. The next prime is 1155477157. The reversal of 1155477149 is 9417745511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128624025 + 26853124 = 33595^2 + 5182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155477149 - 2⁴ = 1155477133 is a prime.

It is a super-2 number, since 2×1155477149² = 2670254883722336402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155477119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577738574 + 577738575.

It is an arithmetic number, because the mean of its divisors is an integer number (577738575).

Almost surely, 2^1155477149 is an apocalyptic number.

It is an amenable number.

1155477149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155477149 is an equidigital number, since it uses as much as digits as its factorization.

1155477149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 44.

The square root of 1155477149 is about 33992.3101450902. The cubic root of 1155477149 is about 1049.3502099044.

The spelling of 1155477149 in words is "one billion, one hundred fifty-five million, four hundred seventy-seven thousand, one hundred forty-nine".