65982949 has 4 divisors (see below), whose sum is σ = 66064140. Its totient is φ = 65901760.

The previous prime is 65982937. The next prime is 65982979. The reversal of 65982949 is 94928956.

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 24186724 + 41796225 = 4918^2 + 6465^2 .

It is a cyclic number.

It is not a de Polignac number, because 65982949 - 2⁷ = 65982821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65982896 and 65982905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65982919) 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, 39364 + ... + 41005.

It is an arithmetic number, because the mean of its divisors is an integer number (16516035).

Almost surely, 2^65982949 is an apocalyptic number.

It is an amenable number.

65982949 is a deficient number, since it is larger than the sum of its proper divisors (81191).

65982949 is an equidigital number, since it uses as much as digits as its factorization.

65982949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81190.

The product of its digits is 1399680, while the sum is 52.

The square root of 65982949 is about 8122.9889203421. The cubic root of 65982949 is about 404.0891974569.

The spelling of 65982949 in words is "sixty-five million, nine hundred eighty-two thousand, nine hundred forty-nine".