117784421 has 2 divisors, whose sum is σ = 117784422. Its totient is φ = 117784420.

The previous prime is 117784417. The next prime is 117784463. The reversal of 117784421 is 124487711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108451396 + 9333025 = 10414^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 117784421 - 2² = 117784417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117784321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58892210 + 58892211.

It is an arithmetic number, because the mean of its divisors is an integer number (58892211).

Almost surely, 2^117784421 is an apocalyptic number.

It is an amenable number.

117784421 is a deficient number, since it is larger than the sum of its proper divisors (1).

117784421 is an equidigital number, since it uses as much as digits as its factorization.

117784421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 35.

The square root of 117784421 is about 10852.8531271735. The cubic root of 117784421 is about 490.1879342968.

The spelling of 117784421 in words is "one hundred seventeen million, seven hundred eighty-four thousand, four hundred twenty-one".