117781273 has 2 divisors, whose sum is σ = 117781274. Its totient is φ = 117781272.

The previous prime is 117781271. The next prime is 117781283. The reversal of 117781273 is 372187711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69172489 + 48608784 = 8317^2 + 6972^2 .

It is a cyclic number.

It is not a de Polignac number, because 117781273 - 2¹ = 117781271 is a prime.

Together with 117781271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117781271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58890636 + 58890637.

It is an arithmetic number, because the mean of its divisors is an integer number (58890637).

Almost surely, 2^117781273 is an apocalyptic number.

It is an amenable number.

117781273 is a deficient number, since it is larger than the sum of its proper divisors (1).

117781273 is an equidigital number, since it uses as much as digits as its factorization.

117781273 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 117781273 is about 10852.7080952175. The cubic root of 117781273 is about 490.1835672072.

The spelling of 117781273 in words is "one hundred seventeen million, seven hundred eighty-one thousand, two hundred seventy-three".