171661453 has 2 divisors, whose sum is σ = 171661454. Its totient is φ = 171661452.

The previous prime is 171661439. The next prime is 171661459. The reversal of 171661453 is 354166171.

171661453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171138724 + 522729 = 13082^2 + 723^2 .

It is a cyclic number.

It is not a de Polignac number, because 171661453 - 2²¹ = 169564301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171661459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85830726 + 85830727.

It is an arithmetic number, because the mean of its divisors is an integer number (85830727).

Almost surely, 2^171661453 is an apocalyptic number.

It is an amenable number.

171661453 is a deficient number, since it is larger than the sum of its proper divisors (1).

171661453 is an equidigital number, since it uses as much as digits as its factorization.

171661453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 171661453 is about 13101.9637077806. The cubic root of 171661453 is about 555.7646608954.

The spelling of 171661453 in words is "one hundred seventy-one million, six hundred sixty-one thousand, four hundred fifty-three".