168428959 has 2 divisors, whose sum is σ = 168428960. Its totient is φ = 168428958.

The previous prime is 168428951. The next prime is 168429017. The reversal of 168428959 is 959824861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168428959 - 2³ = 168428951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168428951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84214479 + 84214480.

It is an arithmetic number, because the mean of its divisors is an integer number (84214480).

Almost surely, 2^168428959 is an apocalyptic number.

168428959 is a deficient number, since it is larger than the sum of its proper divisors (1).

168428959 is an equidigital number, since it uses as much as digits as its factorization.

168428959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 52.

The square root of 168428959 is about 12978.0183001874. The cubic root of 168428959 is about 552.2540652461.

The spelling of 168428959 in words is "one hundred sixty-eight million, four hundred twenty-eight thousand, nine hundred fifty-nine".