201720673 has 12 divisors (see below), whose sum is σ = 253402240. Its totient is φ = 157184280.

The previous prime is 201720667. The next prime is 201720677. The reversal of 201720673 is 376027102.

It is not a de Polignac number, because 201720673 - 2⁵ = 201720641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201720677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118233 + ... + 119926.

Almost surely, 2^201720673 is an apocalyptic number.

It is an amenable number.

201720673 is a deficient number, since it is larger than the sum of its proper divisors (51681567).

201720673 is a wasteful number, since it uses less digits than its factorization.

201720673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238188 (or 238177 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 201720673 is about 14202.8403145286. The cubic root of 201720673 is about 586.4758537436.

Adding to 201720673 its reverse (376027102), we get a palindrome (577747775).

The spelling of 201720673 in words is "two hundred one million, seven hundred twenty thousand, six hundred seventy-three".