651730249 has 2 divisors, whose sum is σ = 651730250. Its totient is φ = 651730248.

The previous prime is 651730199. The next prime is 651730279. The reversal of 651730249 is 942037156.

651730249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 573937849 + 77792400 = 23957^2 + 8820^2 .

It is a cyclic number.

It is not a de Polignac number, because 651730249 - 2⁹ = 651729737 is a prime.

It is not a weakly prime, because it can be changed into another prime (651730279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325865124 + 325865125.

It is an arithmetic number, because the mean of its divisors is an integer number (325865125).

Almost surely, 2^651730249 is an apocalyptic number.

It is an amenable number.

651730249 is a deficient number, since it is larger than the sum of its proper divisors (1).

651730249 is an equidigital number, since it uses as much as digits as its factorization.

651730249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 651730249 is about 25529.0079909110. The cubic root of 651730249 is about 867.0070445228.

The spelling of 651730249 in words is "six hundred fifty-one million, seven hundred thirty thousand, two hundred forty-nine".