83778395 has 4 divisors (see below), whose sum is σ = 100534080. Its totient is φ = 67022712.

The previous prime is 83778371. The next prime is 83778421. The reversal of 83778395 is 59387738.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83778395 - 2¹⁰ = 83777371 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377835 + ... + 8377844.

It is an arithmetic number, because the mean of its divisors is an integer number (25133520).

Almost surely, 2^83778395 is an apocalyptic number.

83778395 is a deficient number, since it is larger than the sum of its proper divisors (16755685).

83778395 is a wasteful number, since it uses less digits than its factorization.

83778395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16755684.

The product of its digits is 1270080, while the sum is 50.

The square root of 83778395 is about 9153.0538619632. The cubic root of 83778395 is about 437.5664465064.

The spelling of 83778395 in words is "eighty-three million, seven hundred seventy-eight thousand, three hundred ninety-five".