168340553 has 2 divisors, whose sum is σ = 168340554. Its totient is φ = 168340552.

The previous prime is 168340489. The next prime is 168340577. The reversal of 168340553 is 355043861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127418944 + 40921609 = 11288^2 + 6397^2 .

It is a cyclic number.

It is not a de Polignac number, because 168340553 - 2⁶ = 168340489 is a prime.

It is not a weakly prime, because it can be changed into another prime (168340253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84170276 + 84170277.

It is an arithmetic number, because the mean of its divisors is an integer number (84170277).

Almost surely, 2^168340553 is an apocalyptic number.

It is an amenable number.

168340553 is a deficient number, since it is larger than the sum of its proper divisors (1).

168340553 is an equidigital number, since it uses as much as digits as its factorization.

168340553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 168340553 is about 12974.6118631734. The cubic root of 168340553 is about 552.1574248627.

The spelling of 168340553 in words is "one hundred sixty-eight million, three hundred forty thousand, five hundred fifty-three".