201728077 has 4 divisors (see below), whose sum is σ = 206648316. Its totient is φ = 196807840.

The previous prime is 201728057. The next prime is 201728081. The reversal of 201728077 is 770827102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91604041 + 110124036 = 9571^2 + 10494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201728077 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 (201728047) 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, 2460058 + ... + 2460139.

It is an arithmetic number, because the mean of its divisors is an integer number (51662079).

Almost surely, 2^201728077 is an apocalyptic number.

It is an amenable number.

201728077 is a deficient number, since it is larger than the sum of its proper divisors (4920239).

201728077 is an equidigital number, since it uses as much as digits as its factorization.

201728077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920238.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 201728077 is about 14203.1009642261. The cubic root of 201728077 is about 586.4830290354.

The spelling of 201728077 in words is "two hundred one million, seven hundred twenty-eight thousand, seventy-seven".