768632281 has 2 divisors, whose sum is σ = 768632282. Its totient is φ = 768632280.

The previous prime is 768632273. The next prime is 768632287. The reversal of 768632281 is 182236867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 768176656 + 455625 = 27716^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 768632281 - 2³ = 768632273 is a prime.

It is a super-2 number, since 2×768632281² = 1181591166790525922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (768632287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384316140 + 384316141.

It is an arithmetic number, because the mean of its divisors is an integer number (384316141).

Almost surely, 2^768632281 is an apocalyptic number.

It is an amenable number.

768632281 is a deficient number, since it is larger than the sum of its proper divisors (1).

768632281 is an equidigital number, since it uses as much as digits as its factorization.

768632281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 768632281 is about 27724.2183117938. The cubic root of 768632281 is about 916.0226379772.

The spelling of 768632281 in words is "seven hundred sixty-eight million, six hundred thirty-two thousand, two hundred eighty-one".