1016700721 has 2 divisors, whose sum is σ = 1016700722. Its totient is φ = 1016700720.

The previous prime is 1016700709. The next prime is 1016700791. The reversal of 1016700721 is 1270076101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683090496 + 333610225 = 26136^2 + 18265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016700721 - 2²⁵ = 983146289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1016700791) 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, 508350360 + 508350361.

It is an arithmetic number, because the mean of its divisors is an integer number (508350361).

Almost surely, 2^1016700721 is an apocalyptic number.

It is an amenable number.

1016700721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016700721 is an equidigital number, since it uses as much as digits as its factorization.

1016700721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 1016700721 is about 31885.7447929322. The cubic root of 1016700721 is about 1005.5362009188.

Adding to 1016700721 its reverse (1270076101), we get a palindrome (2286776822).

The spelling of 1016700721 in words is "one billion, sixteen million, seven hundred thousand, seven hundred twenty-one".