118797521 has 2 divisors, whose sum is σ = 118797522. Its totient is φ = 118797520.

The previous prime is 118797509. The next prime is 118797559. The reversal of 118797521 is 125797811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 37075921 = 9040^2 + 6089^2 .

It is an emirp because it is prime and its reverse (125797811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118797521 - 2¹⁰ = 118796497 is a prime.

It is a super-2 number, since 2×118797521² = 28225701991490882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118497521) 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, 59398760 + 59398761.

It is an arithmetic number, because the mean of its divisors is an integer number (59398761).

Almost surely, 2^118797521 is an apocalyptic number.

It is an amenable number.

118797521 is a deficient number, since it is larger than the sum of its proper divisors (1).

118797521 is an equidigital number, since it uses as much as digits as its factorization.

118797521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 41.

The square root of 118797521 is about 10899.4275537755. The cubic root of 118797521 is about 491.5893429807.

The spelling of 118797521 in words is "one hundred eighteen million, seven hundred ninety-seven thousand, five hundred twenty-one".