728787307 has 2 divisors, whose sum is σ = 728787308. Its totient is φ = 728787306.

The previous prime is 728787299. The next prime is 728787317. The reversal of 728787307 is 703787827.

It is a weak prime.

It is an emirp because it is prime and its reverse (703787827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728787307 - 2³ = 728787299 is a prime.

It is a super-2 number, since 2×728787307² = 1062261877688624498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728787317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364393653 + 364393654.

It is an arithmetic number, because the mean of its divisors is an integer number (364393654).

Almost surely, 2^728787307 is an apocalyptic number.

728787307 is a deficient number, since it is larger than the sum of its proper divisors (1).

728787307 is an equidigital number, since it uses as much as digits as its factorization.

728787307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921984, while the sum is 49.

The square root of 728787307 is about 26996.0609534058. The cubic root of 728787307 is about 899.9124635027.

The spelling of 728787307 in words is "seven hundred twenty-eight million, seven hundred eighty-seven thousand, three hundred seven".