36869521 has 4 divisors (see below), whose sum is σ = 39705652. Its totient is φ = 34033392.

The previous prime is 36869491. The next prime is 36869543. The reversal of 36869521 is 12596863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12596863 = 547 ⋅23029.

It can be written as a sum of positive squares in 2 ways, for example, as 11316496 + 25553025 = 3364^2 + 5055^2 .

It is a cyclic number.

It is not a de Polignac number, because 36869521 - 2⁵ = 36869489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36860521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418046 + ... + 1418071.

It is an arithmetic number, because the mean of its divisors is an integer number (9926413).

Almost surely, 2^36869521 is an apocalyptic number.

It is an amenable number.

36869521 is a deficient number, since it is larger than the sum of its proper divisors (2836131).

36869521 is a wasteful number, since it uses less digits than its factorization.

36869521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836130.

The product of its digits is 77760, while the sum is 40.

The square root of 36869521 is about 6072.0277502660. The cubic root of 36869521 is about 332.8300256488.

The spelling of 36869521 in words is "thirty-six million, eight hundred sixty-nine thousand, five hundred twenty-one".