65849789 has 4 divisors (see below), whose sum is σ = 69723324. Its totient is φ = 61976256.

The previous prime is 65849747. The next prime is 65849803. The reversal of 65849789 is 98794856.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36060025 + 29789764 = 6005^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 65849789 - 2⁸ = 65849533 is a prime.

It is a super-2 number, since 2×65849789² = 8672389422689042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65849089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936742 + ... + 1936775.

It is an arithmetic number, because the mean of its divisors is an integer number (17430831).

Almost surely, 2^65849789 is an apocalyptic number.

It is an amenable number.

65849789 is a deficient number, since it is larger than the sum of its proper divisors (3873535).

65849789 is a wasteful number, since it uses less digits than its factorization.

65849789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873534.

The product of its digits is 4354560, while the sum is 56.

The square root of 65849789 is about 8114.7882905224. The cubic root of 65849789 is about 403.8171839750.

The spelling of 65849789 in words is "sixty-five million, eight hundred forty-nine thousand, seven hundred eighty-nine".