651213047 has 2 divisors, whose sum is σ = 651213048. Its totient is φ = 651213046.

The previous prime is 651212981. The next prime is 651213091. The reversal of 651213047 is 740312156.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651213047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651213547) 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, 325606523 + 325606524.

It is an arithmetic number, because the mean of its divisors is an integer number (325606524).

Almost surely, 2^651213047 is an apocalyptic number.

651213047 is a deficient number, since it is larger than the sum of its proper divisors (1).

651213047 is an equidigital number, since it uses as much as digits as its factorization.

651213047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 651213047 is about 25518.8762879559. The cubic root of 651213047 is about 866.7776364974. Note that the first 3 decimals are identical.

The spelling of 651213047 in words is "six hundred fifty-one million, two hundred thirteen thousand, forty-seven".