728914631 has 2 divisors, whose sum is σ = 728914632. Its totient is φ = 728914630.

The previous prime is 728914609. The next prime is 728914673. The reversal of 728914631 is 136419827.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728914631 is a prime.

It is a super-2 number, since 2×728914631² = 1062633078571732322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728914601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364457315 + 364457316.

It is an arithmetic number, because the mean of its divisors is an integer number (364457316).

Almost surely, 2^728914631 is an apocalyptic number.

728914631 is a deficient number, since it is larger than the sum of its proper divisors (1).

728914631 is an equidigital number, since it uses as much as digits as its factorization.

728914631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 728914631 is about 26998.4190463071. The cubic root of 728914631 is about 899.9648673529.

The spelling of 728914631 in words is "seven hundred twenty-eight million, nine hundred fourteen thousand, six hundred thirty-one".