728694737 has 2 divisors, whose sum is σ = 728694738. Its totient is φ = 728694736.

The previous prime is 728694713. The next prime is 728694739. The reversal of 728694737 is 737496827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623201296 + 105493441 = 24964^2 + 10271^2 .

It is a cyclic number.

It is not a de Polignac number, because 728694737 - 2²⁸ = 460259281 is a prime.

Together with 728694739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728694739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364347368 + 364347369.

It is an arithmetic number, because the mean of its divisors is an integer number (364347369).

Almost surely, 2^728694737 is an apocalyptic number.

It is an amenable number.

728694737 is a deficient number, since it is larger than the sum of its proper divisors (1).

728694737 is an equidigital number, since it uses as much as digits as its factorization.

728694737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 53.

The square root of 728694737 is about 26994.3463895683. The cubic root of 728694737 is about 899.8743598277.

The spelling of 728694737 in words is "seven hundred twenty-eight million, six hundred ninety-four thousand, seven hundred thirty-seven".