651267647 has 2 divisors, whose sum is σ = 651267648. Its totient is φ = 651267646.

The previous prime is 651267613. The next prime is 651267649. The reversal of 651267647 is 746762156.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651267647 - 2²⁰ = 650219071 is a prime.

Together with 651267649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 651267598 and 651267607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651267649) 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, 325633823 + 325633824.

It is an arithmetic number, because the mean of its divisors is an integer number (325633824).

Almost surely, 2^651267647 is an apocalyptic number.

651267647 is a deficient number, since it is larger than the sum of its proper divisors (1).

651267647 is an equidigital number, since it uses as much as digits as its factorization.

651267647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The square root of 651267647 is about 25519.9460618552. The cubic root of 651267647 is about 866.8018603857.

The spelling of 651267647 in words is "six hundred fifty-one million, two hundred sixty-seven thousand, six hundred forty-seven".