173142649 has 4 divisors (see below), whose sum is σ = 182255440. Its totient is φ = 164029860.

The previous prime is 173142601. The next prime is 173142677. The reversal of 173142649 is 946241371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946241371 = 3769 ⋅251059.

It is a cyclic number.

It is not a de Polignac number, because 173142649 - 2²⁵ = 139588217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173148649) 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, 4556367 + ... + 4556404.

It is an arithmetic number, because the mean of its divisors is an integer number (45563860).

Almost surely, 2^173142649 is an apocalyptic number.

173142649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

173142649 is a deficient number, since it is larger than the sum of its proper divisors (9112791).

173142649 is an equidigital number, since it uses as much as digits as its factorization.

173142649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112790.

The product of its digits is 36288, while the sum is 37.

The square root of 173142649 is about 13158.3680219091. The cubic root of 173142649 is about 557.3585733881.

The spelling of 173142649 in words is "one hundred seventy-three million, one hundred forty-two thousand, six hundred forty-nine".