36433981 has 4 divisors (see below), whose sum is σ = 36471100. Its totient is φ = 36396864.

The previous prime is 36433979. The next prime is 36433987. The reversal of 36433981 is 18933463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18933463 = 67 ⋅282589.

It can be written as a sum of positive squares in 2 ways, for example, as 27825625 + 8608356 = 5275^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 36433981 - 2¹ = 36433979 is a prime.

It is a super-2 number, since 2×36433981² = 2654869943016722, 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 36433981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36433987) 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, 17046 + ... + 19063.

It is an arithmetic number, because the mean of its divisors is an integer number (9117775).

Almost surely, 2^36433981 is an apocalyptic number.

It is an amenable number.

36433981 is a deficient number, since it is larger than the sum of its proper divisors (37119).

36433981 is a wasteful number, since it uses less digits than its factorization.

36433981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37118.

The product of its digits is 46656, while the sum is 37.

The square root of 36433981 is about 6036.0567426094. The cubic root of 36433981 is about 331.5142561551.

The spelling of 36433981 in words is "thirty-six million, four hundred thirty-three thousand, nine hundred eighty-one".