83784955 has 8 divisors (see below), whose sum is σ = 100867104. Its totient is φ = 66811200.

The previous prime is 83784949. The next prime is 83784977. The reversal of 83784955 is 55948738.

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

It is a de Polignac number, because none of the positive numbers 2^k-83784955 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83784899 and 83784908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25386 + ... + 28495.

It is an arithmetic number, because the mean of its divisors is an integer number (12608388).

Almost surely, 2^83784955 is an apocalyptic number.

83784955 is a deficient number, since it is larger than the sum of its proper divisors (17082149).

83784955 is a wasteful number, since it uses less digits than its factorization.

83784955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54197.

The product of its digits is 1209600, while the sum is 49.

The square root of 83784955 is about 9153.4122052926. The cubic root of 83784955 is about 437.5778669566.

The spelling of 83784955 in words is "eighty-three million, seven hundred eighty-four thousand, nine hundred fifty-five".