651468709 has 2 divisors, whose sum is σ = 651468710. Its totient is φ = 651468708.

The previous prime is 651468683. The next prime is 651468749. The reversal of 651468709 is 907864156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343360900 + 308107809 = 18530^2 + 17553^2 .

It is a cyclic number.

It is not a de Polignac number, because 651468709 - 2¹⁹ = 650944421 is a prime.

It is a super-2 number, since 2×651468709² = 848822957612253362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651468749) 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, 325734354 + 325734355.

It is an arithmetic number, because the mean of its divisors is an integer number (325734355).

Almost surely, 2^651468709 is an apocalyptic number.

It is an amenable number.

651468709 is a deficient number, since it is larger than the sum of its proper divisors (1).

651468709 is an equidigital number, since it uses as much as digits as its factorization.

651468709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 651468709 is about 25523.8850686959. The cubic root of 651468709 is about 866.8910520744.

The spelling of 651468709 in words is "six hundred fifty-one million, four hundred sixty-eight thousand, seven hundred nine".