1171965449 has 2 divisors, whose sum is σ = 1171965450. Its totient is φ = 1171965448.

The previous prime is 1171965413. The next prime is 1171965461. The reversal of 1171965449 is 9445691711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1106759824 + 65205625 = 33268^2 + 8075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171965449 - 2¹² = 1171961353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171965479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585982724 + 585982725.

It is an arithmetic number, because the mean of its divisors is an integer number (585982725).

Almost surely, 2^1171965449 is an apocalyptic number.

It is an amenable number.

1171965449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171965449 is an equidigital number, since it uses as much as digits as its factorization.

1171965449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 1171965449 is about 34233.9809107851. The cubic root of 1171965449 is about 1054.3179554240.

The spelling of 1171965449 in words is "one billion, one hundred seventy-one million, nine hundred sixty-five thousand, four hundred forty-nine".