117773281 has 2 divisors, whose sum is σ = 117773282. Its totient is φ = 117773280.

The previous prime is 117773269. The next prime is 117773291. The reversal of 117773281 is 182377711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85100625 + 32672656 = 9225^2 + 5716^2 .

It is a cyclic number.

It is not a de Polignac number, because 117773281 - 2⁹ = 117772769 is a prime.

It is a super-2 number, since 2×117773281² = 27741091435009922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 117773281.

It is not a weakly prime, because it can be changed into another prime (117773231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58886640 + 58886641.

It is an arithmetic number, because the mean of its divisors is an integer number (58886641).

Almost surely, 2^117773281 is an apocalyptic number.

It is an amenable number.

117773281 is a deficient number, since it is larger than the sum of its proper divisors (1).

117773281 is an equidigital number, since it uses as much as digits as its factorization.

117773281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 37.

The square root of 117773281 is about 10852.3398859416. The cubic root of 117773281 is about 490.1724798881.

The spelling of 117773281 in words is "one hundred seventeen million, seven hundred seventy-three thousand, two hundred eighty-one".