77808983 has 16 divisors (see below), whose sum is σ = 94501440. Its totient is φ = 62539776.

The previous prime is 77808967. The next prime is 77808989. The reversal of 77808983 is 38980877.

It is a cyclic number.

It is not a de Polignac number, because 77808983 - 2⁴ = 77808967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77808989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36203 + ... + 38291.

It is an arithmetic number, because the mean of its divisors is an integer number (5906340).

Almost surely, 2^77808983 is an apocalyptic number.

77808983 is a deficient number, since it is larger than the sum of its proper divisors (16692457).

77808983 is a wasteful number, since it uses less digits than its factorization.

77808983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 77808983 is about 8820.9400292713. The cubic root of 77808983 is about 426.9168008259.

The spelling of 77808983 in words is "seventy-seven million, eight hundred eight thousand, nine hundred eighty-three".