117780647 has 2 divisors, whose sum is σ = 117780648. Its totient is φ = 117780646.

The previous prime is 117780643. The next prime is 117780653. The reversal of 117780647 is 746087711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117780647 - 2² = 117780643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117780643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58890323 + 58890324.

It is an arithmetic number, because the mean of its divisors is an integer number (58890324).

Almost surely, 2^117780647 is an apocalyptic number.

117780647 is a deficient number, since it is larger than the sum of its proper divisors (1).

117780647 is an equidigital number, since it uses as much as digits as its factorization.

117780647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 117780647 is about 10852.6792544514. The cubic root of 117780647 is about 490.1826987741.

The spelling of 117780647 in words is "one hundred seventeen million, seven hundred eighty thousand, six hundred forty-seven".