3662509 has 4 divisors (see below), whose sum is σ = 3696220. Its totient is φ = 3628800.

The previous prime is 3662473. The next prime is 3662521. The reversal of 3662509 is 9052663.

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 956484 + 2706025 = 978^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 3662509 - 2¹³ = 3654317 is a prime.

It is a Duffinian number.

3662509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3662539) 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, 16692 + ... + 16909.

It is an arithmetic number, because the mean of its divisors is an integer number (924055).

Almost surely, 2^3662509 is an apocalyptic number.

It is an amenable number.

3662509 is a deficient number, since it is larger than the sum of its proper divisors (33711).

3662509 is a wasteful number, since it uses less digits than its factorization.

3662509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33710.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 3662509 is about 1913.7682722838. The cubic root of 3662509 is about 154.1438611831.

The spelling of 3662509 in words is "three million, six hundred sixty-two thousand, five hundred nine".