651764947 has 2 divisors, whose sum is σ = 651764948. Its totient is φ = 651764946.

The previous prime is 651764899. The next prime is 651764957. The reversal of 651764947 is 749467156.

651764947 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 is a cyclic number.

It is not a de Polignac number, because 651764947 - 2¹¹ = 651762899 is a prime.

It is a super-2 number, since 2×651764947² = 849595092275825618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 651764947.

It is not a weakly prime, because it can be changed into another prime (651764957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325882473 + 325882474.

It is an arithmetic number, because the mean of its divisors is an integer number (325882474).

Almost surely, 2^651764947 is an apocalyptic number.

651764947 is a deficient number, since it is larger than the sum of its proper divisors (1).

651764947 is an equidigital number, since it uses as much as digits as its factorization.

651764947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 651764947 is about 25529.6875617388. The cubic root of 651764947 is about 867.0224306823.

The spelling of 651764947 in words is "six hundred fifty-one million, seven hundred sixty-four thousand, nine hundred forty-seven".