721012277 has 2 divisors, whose sum is σ = 721012278. Its totient is φ = 721012276.

The previous prime is 721012199. The next prime is 721012301. The reversal of 721012277 is 772210127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500014321 + 220997956 = 22361^2 + 14866^2 .

It is a cyclic number.

It is not a de Polignac number, because 721012277 - 2¹⁴ = 720995893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721012577) 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, 360506138 + 360506139.

It is an arithmetic number, because the mean of its divisors is an integer number (360506139).

Almost surely, 2^721012277 is an apocalyptic number.

It is an amenable number.

721012277 is a deficient number, since it is larger than the sum of its proper divisors (1).

721012277 is an equidigital number, since it uses as much as digits as its factorization.

721012277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 721012277 is about 26851.6717729083. The cubic root of 721012277 is about 896.7007917773.

The spelling of 721012277 in words is "seven hundred twenty-one million, twelve thousand, two hundred seventy-seven".