1117400981 has 2 divisors, whose sum is σ = 1117400982. Its totient is φ = 1117400980.

The previous prime is 1117400969. The next prime is 1117400987. The reversal of 1117400981 is 1890047111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636300625 + 481100356 = 25225^2 + 21934^2 .

It is an emirp because it is prime and its reverse (1890047111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1117400981 - 2³⁰ = 43659157 is a prime.

It is a super-2 number, since 2×1117400981² = 2497169904679524722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117400987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558700490 + 558700491.

It is an arithmetic number, because the mean of its divisors is an integer number (558700491).

Almost surely, 2^1117400981 is an apocalyptic number.

It is an amenable number.

1117400981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117400981 is an equidigital number, since it uses as much as digits as its factorization.

1117400981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 1117400981 is about 33427.5482349514. The cubic root of 1117400981 is about 1037.6949011304.

The spelling of 1117400981 in words is "one billion, one hundred seventeen million, four hundred thousand, nine hundred eighty-one".