728787469 has 2 divisors, whose sum is σ = 728787470. Its totient is φ = 728787468.

The previous prime is 728787439. The next prime is 728787509. The reversal of 728787469 is 964787827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439447369 + 289340100 = 20963^2 + 17010^2 .

It is a cyclic number.

It is not a de Polignac number, because 728787469 - 2¹⁹ = 728263181 is a prime.

It is a super-2 number, since 2×728787469² = 1062262349942851922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728787439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364393734 + 364393735.

It is an arithmetic number, because the mean of its divisors is an integer number (364393735).

Almost surely, 2^728787469 is an apocalyptic number.

It is an amenable number.

728787469 is a deficient number, since it is larger than the sum of its proper divisors (1).

728787469 is an equidigital number, since it uses as much as digits as its factorization.

728787469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 58.

The square root of 728787469 is about 26996.0639538433. The cubic root of 728787469 is about 899.9125301823.

The spelling of 728787469 in words is "seven hundred twenty-eight million, seven hundred eighty-seven thousand, four hundred sixty-nine".