83782805 has 8 divisors (see below), whose sum is σ = 100903992. Its totient is φ = 66783168.

The previous prime is 83782759. The next prime is 83782807. The reversal of 83782805 is 50828738.

It can be written as a sum of positive squares in 4 ways, for example, as 11566801 + 72216004 = 3401^2 + 8498^2 .

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 83782805 - 2⁸ = 83782549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83782807) 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, 28862 + ... + 31631.

It is an arithmetic number, because the mean of its divisors is an integer number (12612999).

Almost surely, 2^83782805 is an apocalyptic number.

It is an amenable number.

83782805 is a deficient number, since it is larger than the sum of its proper divisors (17121187).

83782805 is a wasteful number, since it uses less digits than its factorization.

83782805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60775.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 83782805 is about 9153.2947619969. The cubic root of 83782805 is about 437.5741240394.

The spelling of 83782805 in words is "eighty-three million, seven hundred eighty-two thousand, eight hundred five".