83825785 has 4 divisors (see below), whose sum is σ = 100590948. Its totient is φ = 67060624.

The previous prime is 83825783. The next prime is 83825801. The reversal of 83825785 is 58752838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58752838 = 2 ⋅29376419.

It can be written as a sum of positive squares in 2 ways, for example, as 44249104 + 39576681 = 6652^2 + 6291^2 .

It is a cyclic number.

It is not a de Polignac number, because 83825785 - 2¹ = 83825783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83825783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8382574 + ... + 8382583.

It is an arithmetic number, because the mean of its divisors is an integer number (25147737).

Almost surely, 2^83825785 is an apocalyptic number.

It is an amenable number.

83825785 is a deficient number, since it is larger than the sum of its proper divisors (16765163).

83825785 is a wasteful number, since it uses less digits than its factorization.

83825785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16765162.

The product of its digits is 537600, while the sum is 46.

The square root of 83825785 is about 9155.6422494547. The cubic root of 83825785 is about 437.6489354155.

The spelling of 83825785 in words is "eighty-three million, eight hundred twenty-five thousand, seven hundred eighty-five".