173397649 has 2 divisors, whose sum is σ = 173397650. Its totient is φ = 173397648.

The previous prime is 173397647. The next prime is 173397683. The reversal of 173397649 is 946793371.

It is a happy number.

173397649 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., 168818049 + 4579600 = 12993^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 173397649 - 2¹ = 173397647 is a prime.

Together with 173397647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (173397647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86698824 + 86698825.

It is an arithmetic number, because the mean of its divisors is an integer number (86698825).

Almost surely, 2^173397649 is an apocalyptic number.

It is an amenable number.

173397649 is a deficient number, since it is larger than the sum of its proper divisors (1).

173397649 is an equidigital number, since it uses as much as digits as its factorization.

173397649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 49.

The square root of 173397649 is about 13168.0541083335. The cubic root of 173397649 is about 557.6320602513.

The spelling of 173397649 in words is "one hundred seventy-three million, three hundred ninety-seven thousand, six hundred forty-nine".