36688669 has 4 divisors (see below), whose sum is σ = 38846844. Its totient is φ = 34530496.

The previous prime is 36688643. The next prime is 36688679. The reversal of 36688669 is 96688663.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96688663 = 19 ⋅5088877.

It can be written as a sum of positive squares in 2 ways, for example, as 34363044 + 2325625 = 5862^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 36688669 - 2⁷ = 36688541 is a prime.

It is a super-2 number, since 2×36688669² = 2692116865983122, 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 (36688609) 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, 1079062 + ... + 1079095.

It is an arithmetic number, because the mean of its divisors is an integer number (9711711).

Almost surely, 2^36688669 is an apocalyptic number.

It is an amenable number.

36688669 is a deficient number, since it is larger than the sum of its proper divisors (2158175).

36688669 is a wasteful number, since it uses less digits than its factorization.

36688669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158174.

The product of its digits is 2239488, while the sum is 52.

The square root of 36688669 is about 6057.1172186115. The cubic root of 36688669 is about 332.2849352637.

The spelling of 36688669 in words is "thirty-six million, six hundred eighty-eight thousand, six hundred sixty-nine".