460993781 has 2 divisors, whose sum is σ = 460993782. Its totient is φ = 460993780.

The previous prime is 460993769. The next prime is 460993823. The reversal of 460993781 is 187399064.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338891281 + 122102500 = 18409^2 + 11050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-460993781 is a prime.

It is a super-2 number, since 2×460993781² = 425030532241351922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (460993681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230496890 + 230496891.

It is an arithmetic number, because the mean of its divisors is an integer number (230496891).

Almost surely, 2^460993781 is an apocalyptic number.

It is an amenable number.

460993781 is a deficient number, since it is larger than the sum of its proper divisors (1).

460993781 is an equidigital number, since it uses as much as digits as its factorization.

460993781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 460993781 is about 21470.7657292422. The cubic root of 460993781 is about 772.4997642113.

The spelling of 460993781 in words is "four hundred sixty million, nine hundred ninety-three thousand, seven hundred eighty-one".