651711089 has 2 divisors, whose sum is σ = 651711090. Its totient is φ = 651711088.

The previous prime is 651711043. The next prime is 651711101. The reversal of 651711089 is 980117156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467294689 + 184416400 = 21617^2 + 13580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651711089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (651711029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325855544 + 325855545.

It is an arithmetic number, because the mean of its divisors is an integer number (325855545).

Almost surely, 2^651711089 is an apocalyptic number.

It is an amenable number.

651711089 is a deficient number, since it is larger than the sum of its proper divisors (1).

651711089 is an equidigital number, since it uses as much as digits as its factorization.

651711089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 651711089 is about 25528.6327287616. The cubic root of 651711089 is about 866.9985481560.

The spelling of 651711089 in words is "six hundred fifty-one million, seven hundred eleven thousand, eighty-nine".