65979245 has 4 divisors (see below), whose sum is σ = 79175100. Its totient is φ = 52783392.

The previous prime is 65979239. The next prime is 65979257. The reversal of 65979245 is 54297956.

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 11485321 + 54493924 = 3389^2 + 7382^2 .

It is a cyclic number.

It is not a de Polignac number, because 65979245 - 2⁶ = 65979181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65979245.

It is a congruent number.

It is an unprimeable number.

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, 6597920 + ... + 6597929.

It is an arithmetic number, because the mean of its divisors is an integer number (19793775).

Almost surely, 2^65979245 is an apocalyptic number.

It is an amenable number.

65979245 is a deficient number, since it is larger than the sum of its proper divisors (13195855).

65979245 is a wasteful number, since it uses less digits than its factorization.

65979245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195854.

The product of its digits is 680400, while the sum is 47.

The square root of 65979245 is about 8122.7609222481. The cubic root of 65979245 is about 404.0816360368.

The spelling of 65979245 in words is "sixty-five million, nine hundred seventy-nine thousand, two hundred forty-five".