36681319 has 4 divisors (see below), whose sum is σ = 37672744. Its totient is φ = 35689896.

The previous prime is 36681299. The next prime is 36681329. The reversal of 36681319 is 91318663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91318663 = 181 ⋅504523.

It is a cyclic number.

It is not a de Polignac number, because 36681319 - 2⁹ = 36680807 is a prime.

It is a super-2 number, since 2×36681319² = 2691038327159522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 991387 = 36681319 / (3 + 6 + 6 + 8 + 1 + 3 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36681329) 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, 495657 + ... + 495730.

It is an arithmetic number, because the mean of its divisors is an integer number (9418186).

Almost surely, 2^36681319 is an apocalyptic number.

36681319 is a deficient number, since it is larger than the sum of its proper divisors (991425).

36681319 is an equidigital number, since it uses as much as digits as its factorization.

36681319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991424.

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

The square root of 36681319 is about 6056.5104639553. The cubic root of 36681319 is about 332.2627444216.

The spelling of 36681319 in words is "thirty-six million, six hundred eighty-one thousand, three hundred nineteen".