36622981 has 4 divisors (see below), whose sum is σ = 38777292. Its totient is φ = 34468672.

The previous prime is 36622979. The next prime is 36622987. The reversal of 36622981 is 18922663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32878756 + 3744225 = 5734^2 + 1935^2 .

It is a cyclic number.

It is not a de Polignac number, because 36622981 - 2¹ = 36622979 is a prime.

It is a super-2 number, since 2×36622981² = 2682485474652722, 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 36622981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36622987) 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, 1077130 + ... + 1077163.

It is an arithmetic number, because the mean of its divisors is an integer number (9694323).

Almost surely, 2^36622981 is an apocalyptic number.

It is an amenable number.

36622981 is a deficient number, since it is larger than the sum of its proper divisors (2154311).

36622981 is a wasteful number, since it uses less digits than its factorization.

36622981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154310.

The product of its digits is 31104, while the sum is 37.

The square root of 36622981 is about 6051.6924079137. The cubic root of 36622981 is about 332.0865073117.

The spelling of 36622981 in words is "thirty-six million, six hundred twenty-two thousand, nine hundred eighty-one".