65872549 has 4 divisors (see below), whose sum is σ = 66612780. Its totient is φ = 65132320.

The previous prime is 65872531. The next prime is 65872579. The reversal of 65872549 is 94527856.

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 30052324 + 35820225 = 5482^2 + 5985^2 .

It is a cyclic number.

It is not a de Polignac number, because 65872549 - 2¹⁷ = 65741477 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65872499 and 65872508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65872519) 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, 369982 + ... + 370159.

It is an arithmetic number, because the mean of its divisors is an integer number (16653195).

Almost surely, 2^65872549 is an apocalyptic number.

It is an amenable number.

65872549 is a deficient number, since it is larger than the sum of its proper divisors (740231).

65872549 is an equidigital number, since it uses as much as digits as its factorization.

65872549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740230.

The product of its digits is 604800, while the sum is 46.

The square root of 65872549 is about 8116.1905472950. The cubic root of 65872549 is about 403.8637030834.

The spelling of 65872549 in words is "sixty-five million, eight hundred seventy-two thousand, five hundred forty-nine".