171830149 has 4 divisors (see below), whose sum is σ = 171874636. Its totient is φ = 171785664.

The previous prime is 171830137. The next prime is 171830159. The reversal of 171830149 is 941038171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941038171 = 173 ⋅5439527.

It can be written as a sum of positive squares in 2 ways, for example, as 60949249 + 110880900 = 7807^2 + 10530^2 .

It is a cyclic number.

It is not a de Polignac number, because 171830149 - 2¹⁹ = 171305861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171830119) 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, 15834 + ... + 24379.

It is an arithmetic number, because the mean of its divisors is an integer number (42968659).

Almost surely, 2^171830149 is an apocalyptic number.

It is an amenable number.

171830149 is a deficient number, since it is larger than the sum of its proper divisors (44487).

171830149 is an equidigital number, since it uses as much as digits as its factorization.

171830149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44486.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 171830149 is about 13108.3999404962. The cubic root of 171830149 is about 555.9466558987.

The spelling of 171830149 in words is "one hundred seventy-one million, eight hundred thirty thousand, one hundred forty-nine".