117620281 has 2 divisors, whose sum is σ = 117620282. Its totient is φ = 117620280.

The previous prime is 117620227. The next prime is 117620287. The reversal of 117620281 is 182026711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81812025 + 35808256 = 9045^2 + 5984^2 .

It is a cyclic number.

It is not a de Polignac number, because 117620281 - 2¹¹ = 117618233 is a prime.

It is a super-2 number, since 2×117620281² = 27669061005037922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117620287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58810140 + 58810141.

It is an arithmetic number, because the mean of its divisors is an integer number (58810141).

Almost surely, 2^117620281 is an apocalyptic number.

It is an amenable number.

117620281 is a deficient number, since it is larger than the sum of its proper divisors (1).

117620281 is an equidigital number, since it uses as much as digits as its factorization.

117620281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 117620281 is about 10845.2884240116. The cubic root of 117620281 is about 489.9601258682.

Adding to 117620281 its reverse (182026711), we get a palindrome (299646992).

The spelling of 117620281 in words is "one hundred seventeen million, six hundred twenty thousand, two hundred eighty-one".