118717481 has 2 divisors, whose sum is σ = 118717482. Its totient is φ = 118717480.

The previous prime is 118717439. The next prime is 118717483. The reversal of 118717481 is 184717811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 234256 = 10885^2 + 484^2 .

It is an emirp because it is prime and its reverse (184717811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118717481 is a prime.

It is a super-2 number, since 2×118717481² = 28187680589970722, which contains 22 as substring.

Together with 118717483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118717483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59358740 + 59358741.

It is an arithmetic number, because the mean of its divisors is an integer number (59358741).

Almost surely, 2^118717481 is an apocalyptic number.

It is an amenable number.

118717481 is a deficient number, since it is larger than the sum of its proper divisors (1).

118717481 is an equidigital number, since it uses as much as digits as its factorization.

118717481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 38.

The square root of 118717481 is about 10895.7551826388. The cubic root of 118717481 is about 491.4789151686.

The spelling of 118717481 in words is "one hundred eighteen million, seven hundred seventeen thousand, four hundred eighty-one".