36193681 has 8 divisors (see below), whose sum is σ = 36602280. Its totient is φ = 35787648.

The previous prime is 36193673. The next prime is 36193687. The reversal of 36193681 is 18639163.

It can be written as a sum of positive squares in 4 ways, for example, as 2739025 + 33454656 = 1655^2 + 5784^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36193681 - 2³ = 36193673 is a prime.

It is a super-2 number, since 2×36193681² = 2619965088659522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36193681.

It is not an unprimeable number, because it can be changed into a prime (36193687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41805 + ... + 42661.

It is an arithmetic number, because the mean of its divisors is an integer number (4575285).

Almost surely, 2^36193681 is an apocalyptic number.

It is an amenable number.

36193681 is a deficient number, since it is larger than the sum of its proper divisors (408599).

36193681 is a wasteful number, since it uses less digits than its factorization.

36193681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 23328, while the sum is 37.

The square root of 36193681 is about 6016.1184330098. The cubic root of 36193681 is about 330.7838148040.

The spelling of 36193681 in words is "thirty-six million, one hundred ninety-three thousand, six hundred eighty-one".