36684621 has 6 divisors (see below), whose sum is σ = 52988910. Its totient is φ = 24456408.

The previous prime is 36684619. The next prime is 36684631. The reversal of 36684621 is 12648663.

It can be written as a sum of positive squares in only one way, i.e., 28355625 + 8328996 = 5325^2 + 2886^2 .

It is not a de Polignac number, because 36684621 - 2¹ = 36684619 is a prime.

It is a super-2 number, since 2×36684621² = 2691522835827282, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36684601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2038026 + ... + 2038043.

It is an arithmetic number, because the mean of its divisors is an integer number (8831485).

Almost surely, 2^36684621 is an apocalyptic number.

It is an amenable number.

36684621 is a deficient number, since it is larger than the sum of its proper divisors (16304289).

36684621 is a wasteful number, since it uses less digits than its factorization.

36684621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076075 (or 4076072 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 36684621 is about 6056.7830570361. The cubic root of 36684621 is about 332.2727140618.

The spelling of 36684621 in words is "thirty-six million, six hundred eighty-four thousand, six hundred twenty-one".