173346421 has 2 divisors, whose sum is σ = 173346422. Its totient is φ = 173346420.

The previous prime is 173346403. The next prime is 173346473. The reversal of 173346421 is 124643371.

173346421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144937521 + 28408900 = 12039^2 + 5330^2 .

It is a cyclic number.

It is not a de Polignac number, because 173346421 - 2²¹ = 171249269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173346821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86673210 + 86673211.

It is an arithmetic number, because the mean of its divisors is an integer number (86673211).

Almost surely, 2^173346421 is an apocalyptic number.

It is an amenable number.

173346421 is a deficient number, since it is larger than the sum of its proper divisors (1).

173346421 is an equidigital number, since it uses as much as digits as its factorization.

173346421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 173346421 is about 13166.1088025278. The cubic root of 173346421 is about 557.5771398819.

Adding to 173346421 its reverse (124643371), we get a palindrome (297989792).

The spelling of 173346421 in words is "one hundred seventy-three million, three hundred forty-six thousand, four hundred twenty-one".