118280381 has 2 divisors, whose sum is σ = 118280382. Its totient is φ = 118280380.

The previous prime is 118280363. The next prime is 118280411. The reversal of 118280381 is 183082811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 37100281 = 9010^2 + 6091^2 .

It is a cyclic number.

It is not a de Polignac number, because 118280381 - 2⁶ = 118280317 is a prime.

It is a super-2 number, since 2×118280381² = 27980497059010322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118280311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59140190 + 59140191.

It is an arithmetic number, because the mean of its divisors is an integer number (59140191).

Almost surely, 2^118280381 is an apocalyptic number.

It is an amenable number.

118280381 is a deficient number, since it is larger than the sum of its proper divisors (1).

118280381 is an equidigital number, since it uses as much as digits as its factorization.

118280381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 118280381 is about 10875.6784156208. The cubic root of 118280381 is about 490.8749894329.

The spelling of 118280381 in words is "one hundred eighteen million, two hundred eighty thousand, three hundred eighty-one".