728192389 has 2 divisors, whose sum is σ = 728192390. Its totient is φ = 728192388.

The previous prime is 728192371. The next prime is 728192417. The reversal of 728192389 is 983291827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 671069025 + 57123364 = 25905^2 + 7558^2 .

It is a cyclic number.

It is not a de Polignac number, because 728192389 - 2⁵ = 728192357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728192329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364096194 + 364096195.

It is an arithmetic number, because the mean of its divisors is an integer number (364096195).

Almost surely, 2^728192389 is an apocalyptic number.

It is an amenable number.

728192389 is a deficient number, since it is larger than the sum of its proper divisors (1).

728192389 is an equidigital number, since it uses as much as digits as its factorization.

728192389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 728192389 is about 26985.0400963200. The cubic root of 728192389 is about 899.6675269890.

The spelling of 728192389 in words is "seven hundred twenty-eight million, one hundred ninety-two thousand, three hundred eighty-nine".