118487321 has 2 divisors, whose sum is σ = 118487322. Its totient is φ = 118487320.

The previous prime is 118487293. The next prime is 118487323. The reversal of 118487321 is 123784811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 4096 = 10885^2 + 64^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118487321 is a prime.

It is a Sophie Germain prime.

Together with 118487323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (118487323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59243660 + 59243661.

It is an arithmetic number, because the mean of its divisors is an integer number (59243661).

Almost surely, 2^118487321 is an apocalyptic number.

It is an amenable number.

118487321 is a deficient number, since it is larger than the sum of its proper divisors (1).

118487321 is an equidigital number, since it uses as much as digits as its factorization.

118487321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 35.

The square root of 118487321 is about 10885.1881472026. The cubic root of 118487321 is about 491.1610962961.

The spelling of 118487321 in words is "one hundred eighteen million, four hundred eighty-seven thousand, three hundred twenty-one".