768283821 has 6 divisors (see below), whose sum is σ = 1109743310. Its totient is φ = 512189208.

The previous prime is 768283811. The next prime is 768283823. The reversal of 768283821 is 128382867.

It can be written as a sum of positive squares in only one way, i.e., 706974921 + 61308900 = 26589^2 + 7830^2 .

It is not a de Polignac number, because 768283821 - 2⁷ = 768283693 is a prime.

It is a super-2 number, since 2×768283821² = 1180520059220720082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768283823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42682426 + ... + 42682443.

Almost surely, 2^768283821 is an apocalyptic number.

It is an amenable number.

768283821 is a deficient number, since it is larger than the sum of its proper divisors (341459489).

768283821 is a wasteful number, since it uses less digits than its factorization.

768283821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85364875 (or 85364872 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 768283821 is about 27717.9332021708. The cubic root of 768283821 is about 915.8841905450.

The spelling of 768283821 in words is "seven hundred sixty-eight million, two hundred eighty-three thousand, eight hundred twenty-one".