1171603481 has 2 divisors, whose sum is σ = 1171603482. Its totient is φ = 1171603480.

The previous prime is 1171603471. The next prime is 1171603487. The reversal of 1171603481 is 1843061711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163423881 + 8179600 = 34109^2 + 2860^2 .

It is an emirp because it is prime and its reverse (1843061711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1171603481 - 2²⁶ = 1104494617 is a prime.

It is a super-2 number, since 2×1171603481² = 2745309433382634722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1171603487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585801740 + 585801741.

It is an arithmetic number, because the mean of its divisors is an integer number (585801741).

Almost surely, 2^1171603481 is an apocalyptic number.

It is an amenable number.

1171603481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171603481 is an equidigital number, since it uses as much as digits as its factorization.

1171603481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1171603481 is about 34228.6938255026. The cubic root of 1171603481 is about 1054.2094002733.

The spelling of 1171603481 in words is "one billion, one hundred seventy-one million, six hundred three thousand, four hundred eighty-one".