83778895 has 8 divisors (see below), whose sum is σ = 103777920. Its totient is φ = 64860960.

The previous prime is 83778881. The next prime is 83778899. The reversal of 83778895 is 59887738.

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

It is not a de Polignac number, because 83778895 - 2¹⁹ = 83254607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83778899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270100 + ... + 270409.

It is an arithmetic number, because the mean of its divisors is an integer number (12972240).

Almost surely, 2^83778895 is an apocalyptic number.

83778895 is a deficient number, since it is larger than the sum of its proper divisors (19999025).

83778895 is a wasteful number, since it uses less digits than its factorization.

83778895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540545.

The product of its digits is 3386880, while the sum is 55.

The square root of 83778895 is about 9153.0811752109. The cubic root of 83778895 is about 437.5673169885.

The spelling of 83778895 in words is "eighty-three million, seven hundred seventy-eight thousand, eight hundred ninety-five".