117820427 has 2 divisors, whose sum is σ = 117820428. Its totient is φ = 117820426.

The previous prime is 117820403. The next prime is 117820441. The reversal of 117820427 is 724028711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117820427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117820393 and 117820402.

It is not a weakly prime, because it can be changed into another prime (117820447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58910213 + 58910214.

It is an arithmetic number, because the mean of its divisors is an integer number (58910214).

Almost surely, 2^117820427 is an apocalyptic number.

117820427 is a deficient number, since it is larger than the sum of its proper divisors (1).

117820427 is an equidigital number, since it uses as much as digits as its factorization.

117820427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 117820427 is about 10854.5118268856. The cubic root of 117820427 is about 490.2378783909.

The spelling of 117820427 in words is "one hundred seventeen million, eight hundred twenty thousand, four hundred twenty-seven".