1161321803 has 2 divisors, whose sum is σ = 1161321804. Its totient is φ = 1161321802.

The previous prime is 1161321713. The next prime is 1161321817. The reversal of 1161321803 is 3081231611.

It is a strong prime.

It is an emirp because it is prime and its reverse (3081231611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161321803 - 2¹⁶ = 1161256267 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1161321103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580660901 + 580660902.

It is an arithmetic number, because the mean of its divisors is an integer number (580660902).

Almost surely, 2^1161321803 is an apocalyptic number.

1161321803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161321803 is an equidigital number, since it uses as much as digits as its factorization.

1161321803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1161321803 is about 34078.1719433423. The cubic root of 1161321803 is about 1051.1165154337.

The spelling of 1161321803 in words is "one billion, one hundred sixty-one million, three hundred twenty-one thousand, eight hundred three".