728787377 has 2 divisors, whose sum is σ = 728787378. Its totient is φ = 728787376.

The previous prime is 728787347. The next prime is 728787383. The reversal of 728787377 is 773787827.

It is a happy number.

728787377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709742881 + 19044496 = 26641^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 728787377 - 2¹⁰ = 728786353 is a prime.

It is a super-2 number, since 2×728787377² = 1062262081749080258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728787307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364393688 + 364393689.

It is an arithmetic number, because the mean of its divisors is an integer number (364393689).

Almost surely, 2^728787377 is an apocalyptic number.

It is an amenable number.

728787377 is a deficient number, since it is larger than the sum of its proper divisors (1).

728787377 is an equidigital number, since it uses as much as digits as its factorization.

728787377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6453888, while the sum is 56.

The square root of 728787377 is about 26996.0622498912. The cubic root of 728787377 is about 899.9124923149.

The spelling of 728787377 in words is "seven hundred twenty-eight million, seven hundred eighty-seven thousand, three hundred seventy-seven".