651610409 has 2 divisors, whose sum is σ = 651610410. Its totient is φ = 651610408.

The previous prime is 651610403. The next prime is 651610423. The reversal of 651610409 is 904016156.

651610409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622752025 + 28858384 = 24955^2 + 5372^2 .

It is a cyclic number.

It is not a de Polignac number, because 651610409 - 2¹² = 651606313 is a prime.

It is a super-2 number, since 2×651610409² = 849192250234294562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (651610403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325805204 + 325805205.

It is an arithmetic number, because the mean of its divisors is an integer number (325805205).

Almost surely, 2^651610409 is an apocalyptic number.

It is an amenable number.

651610409 is a deficient number, since it is larger than the sum of its proper divisors (1).

651610409 is an equidigital number, since it uses as much as digits as its factorization.

651610409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 651610409 is about 25526.6607491070. The cubic root of 651610409 is about 866.9538995836.

The spelling of 651610409 in words is "six hundred fifty-one million, six hundred ten thousand, four hundred nine".