727076921 has 2 divisors, whose sum is σ = 727076922. Its totient is φ = 727076920.

The previous prime is 727076869. The next prime is 727076941. The reversal of 727076921 is 129670727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398561296 + 328515625 = 19964^2 + 18125^2 .

It is an emirp because it is prime and its reverse (129670727) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-727076921 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (727076941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363538460 + 363538461.

It is an arithmetic number, because the mean of its divisors is an integer number (363538461).

Almost surely, 2^727076921 is an apocalyptic number.

It is an amenable number.

727076921 is a deficient number, since it is larger than the sum of its proper divisors (1).

727076921 is an equidigital number, since it uses as much as digits as its factorization.

727076921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 727076921 is about 26964.3639086851. The cubic root of 727076921 is about 899.2079125556.

The spelling of 727076921 in words is "seven hundred twenty-seven million, seventy-six thousand, nine hundred twenty-one".