83778005 has 8 divisors (see below), whose sum is σ = 101040000. Its totient is φ = 66684816.

The previous prime is 83777987. The next prime is 83778007. The reversal of 83778005 is 50087738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83778005 - 2¹⁴ = 83761621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83778005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83778007) 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 7 ways as a sum of consecutive naturals, for example, 41105 + ... + 43094.

It is an arithmetic number, because the mean of its divisors is an integer number (12630000).

Almost surely, 2^83778005 is an apocalyptic number.

It is an amenable number.

83778005 is a deficient number, since it is larger than the sum of its proper divisors (17261995).

83778005 is a wasteful number, since it uses less digits than its factorization.

83778005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84403.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 83778005 is about 9153.0325575735. The cubic root of 83778005 is about 437.5657675279.

The spelling of 83778005 in words is "eighty-three million, seven hundred seventy-eight thousand, five".