171670553 has 4 divisors (see below), whose sum is σ = 171777060. Its totient is φ = 171564048.

The previous prime is 171670547. The next prime is 171670559. The reversal of 171670553 is 355076171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355076171 = 113 ⋅3142267.

It is an interprime number because it is at equal distance from previous prime (171670547) and next prime (171670559).

It can be written as a sum of positive squares in 2 ways, for example, as 24970009 + 146700544 = 4997^2 + 12112^2 .

It is a cyclic number.

It is not a de Polignac number, because 171670553 - 2⁸ = 171670297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (171670559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50798 + ... + 54071.

It is an arithmetic number, because the mean of its divisors is an integer number (42944265).

Almost surely, 2^171670553 is an apocalyptic number.

It is an amenable number.

171670553 is a deficient number, since it is larger than the sum of its proper divisors (106507).

171670553 is a wasteful number, since it uses less digits than its factorization.

171670553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106506.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 171670553 is about 13102.3109793654. The cubic root of 171670553 is about 555.7744813277.

The spelling of 171670553 in words is "one hundred seventy-one million, six hundred seventy thousand, five hundred fifty-three".