173491397 has 4 divisors (see below), whose sum is σ = 173667456. Its totient is φ = 173315340.

The previous prime is 173491393. The next prime is 173491403. The reversal of 173491397 is 793194371.

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: 793194371 = 2731 ⋅290441.

It is a cyclic number.

It is not a de Polignac number, because 173491397 - 2² = 173491393 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 (173491391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86543 + ... + 88524.

It is an arithmetic number, because the mean of its divisors is an integer number (43416864).

Almost surely, 2^173491397 is an apocalyptic number.

It is an amenable number.

173491397 is a deficient number, since it is larger than the sum of its proper divisors (176059).

173491397 is an equidigital number, since it uses as much as digits as its factorization.

173491397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176058.

The product of its digits is 142884, while the sum is 44.

The square root of 173491397 is about 13171.6133028570. The cubic root of 173491397 is about 557.7325373383.

The spelling of 173491397 in words is "one hundred seventy-three million, four hundred ninety-one thousand, three hundred ninety-seven".