36611989 has 4 divisors (see below), whose sum is σ = 36769356. Its totient is φ = 36454624.

The previous prime is 36611987. The next prime is 36612053. The reversal of 36611989 is 98911663.

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 4915089 + 31696900 = 2217^2 + 5630^2 .

It is a cyclic number.

It is not a de Polignac number, because 36611989 - 2¹ = 36611987 is a prime.

It is a super-2 number, since 2×36611989² = 2680875477072242, 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 (36611987) 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, 78334 + ... + 78799.

It is an arithmetic number, because the mean of its divisors is an integer number (9192339).

Almost surely, 2^36611989 is an apocalyptic number.

It is an amenable number.

36611989 is a deficient number, since it is larger than the sum of its proper divisors (157367).

36611989 is a wasteful number, since it uses less digits than its factorization.

36611989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157366.

The product of its digits is 69984, while the sum is 43.

The square root of 36611989 is about 6050.7841640568. The cubic root of 36611989 is about 332.0532799041.

The spelling of 36611989 in words is "thirty-six million, six hundred eleven thousand, nine hundred eighty-nine".