728212949 has 2 divisors, whose sum is σ = 728212950. Its totient is φ = 728212948.

The previous prime is 728212907. The next prime is 728212963. The reversal of 728212949 is 949212827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697488100 + 30724849 = 26410^2 + 5543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728212949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728212249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364106474 + 364106475.

It is an arithmetic number, because the mean of its divisors is an integer number (364106475).

Almost surely, 2^728212949 is an apocalyptic number.

It is an amenable number.

728212949 is a deficient number, since it is larger than the sum of its proper divisors (1).

728212949 is an equidigital number, since it uses as much as digits as its factorization.

728212949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 728212949 is about 26985.4210454460. The cubic root of 728212949 is about 899.6759940693.

The spelling of 728212949 in words is "seven hundred twenty-eight million, two hundred twelve thousand, nine hundred forty-nine".