783980920906 has 32 divisors (see below), whose sum is σ = 1247439932928. Its totient is φ = 368878173120.

The previous prime is 783980920901. The next prime is 783980920907. The reversal of 783980920906 is 609029089387.

It is a happy number.

It is a super-2 number, since 2×783980920906² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (783980920901) 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 in 15 ways as a sum of consecutive naturals, for example, 3876901 + ... + 4074103.

It is an arithmetic number, because the mean of its divisors is an integer number (38982497904).

Almost surely, 2^783980920906 is an apocalyptic number.

783980920906 is a deficient number, since it is larger than the sum of its proper divisors (463459012022).

783980920906 is a wasteful number, since it uses less digits than its factorization.

783980920906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199006.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 783980920906 in words is "seven hundred eighty-three billion, nine hundred eighty million, nine hundred twenty thousand, nine hundred six".