783923668 has 18 divisors (see below), whose sum is σ = 1507920218. Its totient is φ = 356328720.

The previous prime is 783923663. The next prime is 783923677. The reversal of 783923668 is 866329387.

It can be written as a sum of positive squares in only one way, i.e., 767179204 + 16744464 = 27698^2 + 4092^2 .

It is a super-2 number, since 2×783923668² = 1229072634501148448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783923663) 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, 809355 + ... + 810322.

Almost surely, 2^783923668 is an apocalyptic number.

It is an amenable number.

783923668 is a deficient number, since it is larger than the sum of its proper divisors (723996550).

783923668 is a wasteful number, since it uses less digits than its factorization.

783923668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619703 (or 1619690 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The square root of 783923668 is about 27998.6368953919. The cubic root of 783923668 is about 922.0573319453.

The spelling of 783923668 in words is "seven hundred eighty-three million, nine hundred twenty-three thousand, six hundred sixty-eight".