117662221 has 2 divisors, whose sum is σ = 117662222. Its totient is φ = 117662220.

The previous prime is 117662201. The next prime is 117662243. The reversal of 117662221 is 122266711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117288900 + 373321 = 10830^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 117662221 - 2⁵ = 117662189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117662221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117662201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58831110 + 58831111.

It is an arithmetic number, because the mean of its divisors is an integer number (58831111).

Almost surely, 2^117662221 is an apocalyptic number.

It is an amenable number.

117662221 is a deficient number, since it is larger than the sum of its proper divisors (1).

117662221 is an equidigital number, since it uses as much as digits as its factorization.

117662221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 117662221 is about 10847.2218102148. The cubic root of 117662221 is about 490.0183541646.

The spelling of 117662221 in words is "one hundred seventeen million, six hundred sixty-two thousand, two hundred twenty-one".