651672643 has 2 divisors, whose sum is σ = 651672644. Its totient is φ = 651672642.

The previous prime is 651672631. The next prime is 651672647. The reversal of 651672643 is 346276156.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651672643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 651672596 and 651672605.

It is not a weakly prime, because it can be changed into another prime (651672647) 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, 325836321 + 325836322.

It is an arithmetic number, because the mean of its divisors is an integer number (325836322).

Almost surely, 2^651672643 is an apocalyptic number.

651672643 is a deficient number, since it is larger than the sum of its proper divisors (1).

651672643 is an equidigital number, since it uses as much as digits as its factorization.

651672643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 651672643 is about 25527.8797200238. The cubic root of 651672643 is about 866.9814990462.

The spelling of 651672643 in words is "six hundred fifty-one million, six hundred seventy-two thousand, six hundred forty-three".