117443581 has 2 divisors, whose sum is σ = 117443582. Its totient is φ = 117443580.

The previous prime is 117443567. The next prime is 117443597. The reversal of 117443581 is 185344711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116748025 + 695556 = 10805^2 + 834^2 .

It is an emirp because it is prime and its reverse (185344711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117443581 - 2⁵ = 117443549 is a prime.

It is a super-2 number, since 2×117443581² = 27585989436207122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117443551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58721790 + 58721791.

It is an arithmetic number, because the mean of its divisors is an integer number (58721791).

Almost surely, 2^117443581 is an apocalyptic number.

It is an amenable number.

117443581 is a deficient number, since it is larger than the sum of its proper divisors (1).

117443581 is an equidigital number, since it uses as much as digits as its factorization.

117443581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 117443581 is about 10837.1389674582. The cubic root of 117443581 is about 489.7146485184.

The spelling of 117443581 in words is "one hundred seventeen million, four hundred forty-three thousand, five hundred eighty-one".