36620681 has 4 divisors (see below), whose sum is σ = 36983364. Its totient is φ = 36258000.

The previous prime is 36620677. The next prime is 36620693. The reversal of 36620681 is 18602663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18602663 = 73 ⋅254831.

It can be written as a sum of positive squares in 2 ways, for example, as 16000000 + 20620681 = 4000^2 + 4541^2 .

It is a cyclic number.

It is not a de Polignac number, because 36620681 - 2² = 36620677 is a prime.

It is a super-3 number, since 3×36620681³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (36620611) 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, 181190 + ... + 181391.

It is an arithmetic number, because the mean of its divisors is an integer number (9245841).

Almost surely, 2^36620681 is an apocalyptic number.

It is an amenable number.

36620681 is a deficient number, since it is larger than the sum of its proper divisors (362683).

36620681 is a wasteful number, since it uses less digits than its factorization.

36620681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362682.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 36620681 is about 6051.5023754436. The cubic root of 36620681 is about 332.0795552565.

The spelling of 36620681 in words is "thirty-six million, six hundred twenty thousand, six hundred eighty-one".