171161401 has 2 divisors, whose sum is σ = 171161402. Its totient is φ = 171161400.

The previous prime is 171161399. The next prime is 171161407. The reversal of 171161401 is 104161171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98485776 + 72675625 = 9924^2 + 8525^2 .

It is an emirp because it is prime and its reverse (104161171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171161401 - 2¹ = 171161399 is a prime.

Together with 171161399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (171161407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85580700 + 85580701.

It is an arithmetic number, because the mean of its divisors is an integer number (85580701).

Almost surely, 2^171161401 is an apocalyptic number.

It is an amenable number.

171161401 is a deficient number, since it is larger than the sum of its proper divisors (1).

171161401 is an equidigital number, since it uses as much as digits as its factorization.

171161401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 171161401 is about 13082.8666965616. The cubic root of 171161401 is about 555.2244861971.

The spelling of 171161401 in words is "one hundred seventy-one million, one hundred sixty-one thousand, four hundred one".