117727481 has 2 divisors, whose sum is σ = 117727482. Its totient is φ = 117727480.

The previous prime is 117727471. The next prime is 117727483. The reversal of 117727481 is 184727711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77721856 + 40005625 = 8816^2 + 6325^2 .

It is a cyclic number.

It is not a de Polignac number, because 117727481 - 2⁶ = 117727417 is a prime.

It is a super-2 number, since 2×117727481² = 27719519565210722, which contains 22 as substring.

Together with 117727483, 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 (117727483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58863740 + 58863741.

It is an arithmetic number, because the mean of its divisors is an integer number (58863741).

Almost surely, 2^117727481 is an apocalyptic number.

It is an amenable number.

117727481 is a deficient number, since it is larger than the sum of its proper divisors (1).

117727481 is an equidigital number, since it uses as much as digits as its factorization.

117727481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21952, while the sum is 38.

The square root of 117727481 is about 10850.2295367425. The cubic root of 117727481 is about 490.1089317722.

The spelling of 117727481 in words is "one hundred seventeen million, seven hundred twenty-seven thousand, four hundred eighty-one".