168820357 has 2 divisors, whose sum is σ = 168820358. Its totient is φ = 168820356.

The previous prime is 168820349. The next prime is 168820409. The reversal of 168820357 is 753028861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152547201 + 16273156 = 12351^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 168820357 - 2³ = 168820349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168820957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84410178 + 84410179.

It is an arithmetic number, because the mean of its divisors is an integer number (84410179).

Almost surely, 2^168820357 is an apocalyptic number.

It is an amenable number.

168820357 is a deficient number, since it is larger than the sum of its proper divisors (1).

168820357 is an equidigital number, since it uses as much as digits as its factorization.

168820357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 168820357 is about 12993.0888167518. The cubic root of 168820357 is about 552.6815133561.

The spelling of 168820357 in words is "one hundred sixty-eight million, eight hundred twenty thousand, three hundred fifty-seven".