464320781 has 2 divisors, whose sum is σ = 464320782. Its totient is φ = 464320780.

The previous prime is 464320771. The next prime is 464320817. The reversal of 464320781 is 187023464.

Together with next prime (464320817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273604681 + 190716100 = 16541^2 + 13810^2 .

It is a cyclic number.

It is not a de Polignac number, because 464320781 - 2¹⁴ = 464304397 is a prime.

It is a super-2 number, since 2×464320781² = 431187575336899922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (464320771) 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, 232160390 + 232160391.

It is an arithmetic number, because the mean of its divisors is an integer number (232160391).

Almost surely, 2^464320781 is an apocalyptic number.

It is an amenable number.

464320781 is a deficient number, since it is larger than the sum of its proper divisors (1).

464320781 is an equidigital number, since it uses as much as digits as its factorization.

464320781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 464320781 is about 21548.1038841008. The cubic root of 464320781 is about 774.3536927295.

The spelling of 464320781 in words is "four hundred sixty-four million, three hundred twenty thousand, seven hundred eighty-one".