1117001801 has 2 divisors, whose sum is σ = 1117001802. Its totient is φ = 1117001800.

The previous prime is 1117001797. The next prime is 1117001819. The reversal of 1117001801 is 1081007111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079779600 + 37222201 = 32860^2 + 6101^2 .

It is an emirp because it is prime and its reverse (1081007111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1117001801 - 2² = 1117001797 is a prime.

It is not a weakly prime, because it can be changed into another prime (1117001401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558500900 + 558500901.

It is an arithmetic number, because the mean of its divisors is an integer number (558500901).

Almost surely, 2^1117001801 is an apocalyptic number.

It is an amenable number.

1117001801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117001801 is an equidigital number, since it uses as much as digits as its factorization.

1117001801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

The square root of 1117001801 is about 33421.5768778195. The cubic root of 1117001801 is about 1037.5713178052.

Adding to 1117001801 its reverse (1081007111), we get a palindrome (2198008912).

The spelling of 1117001801 in words is "one billion, one hundred seventeen million, one thousand, eight hundred one".