651380969 has 2 divisors, whose sum is σ = 651380970. Its totient is φ = 651380968.

The previous prime is 651380957. The next prime is 651380987. The reversal of 651380969 is 969083156.

651380969 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., 580231744 + 71149225 = 24088^2 + 8435^2 .

It is a cyclic number.

It is not a de Polignac number, because 651380969 - 2⁸ = 651380713 is a prime.

It is a super-2 number, since 2×651380969² = 848594333550757922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (651380069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325690484 + 325690485.

It is an arithmetic number, because the mean of its divisors is an integer number (325690485).

Almost surely, 2^651380969 is an apocalyptic number.

It is an amenable number.

651380969 is a deficient number, since it is larger than the sum of its proper divisors (1).

651380969 is an equidigital number, since it uses as much as digits as its factorization.

651380969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 651380969 is about 25522.1662285943. The cubic root of 651380969 is about 866.8521326120.

The spelling of 651380969 in words is "six hundred fifty-one million, three hundred eighty thousand, nine hundred sixty-nine".