36343781 has 4 divisors (see below), whose sum is σ = 36380064. Its totient is φ = 36307500.

The previous prime is 36343759. The next prime is 36343787. The reversal of 36343781 is 18734363.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18734363 = 3821 ⋅4903.

It is a cyclic number.

It is not a de Polignac number, because 36343781 - 2²² = 32149477 is a prime.

It is a super-2 number, since 2×36343781² = 2641740834751922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36343787) 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, 16595 + ... + 18656.

It is an arithmetic number, because the mean of its divisors is an integer number (9095016).

Almost surely, 2^36343781 is an apocalyptic number.

It is an amenable number.

36343781 is a deficient number, since it is larger than the sum of its proper divisors (36283).

36343781 is a wasteful number, since it uses less digits than its factorization.

36343781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36282.

The product of its digits is 36288, while the sum is 35.

The square root of 36343781 is about 6028.5803469805. The cubic root of 36343781 is about 331.2404522702.

It can be divided in two parts, 363 and 43781, that added together give a palindrome (44144).

The spelling of 36343781 in words is "thirty-six million, three hundred forty-three thousand, seven hundred eighty-one".