36988661 has 4 divisors (see below), whose sum is σ = 37006092. Its totient is φ = 36971232.

The previous prime is 36988621. The next prime is 36988691. The reversal of 36988661 is 16688963.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16688963 = 67 ⋅249089.

It can be written as a sum of positive squares in 2 ways, for example, as 18447025 + 18541636 = 4295^2 + 4306^2 .

It is a cyclic number.

It is not a de Polignac number, because 36988661 - 2⁶ = 36988597 is a prime.

It is a super-2 number, since 2×36988661² = 2736322085145842, 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 (36988621) 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, 5006 + ... + 9951.

It is an arithmetic number, because the mean of its divisors is an integer number (9251523).

Almost surely, 2^36988661 is an apocalyptic number.

It is an amenable number.

36988661 is a deficient number, since it is larger than the sum of its proper divisors (17431).

36988661 is a wasteful number, since it uses less digits than its factorization.

36988661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17430.

The product of its digits is 373248, while the sum is 47.

The square root of 36988661 is about 6081.8303988191. The cubic root of 36988661 is about 333.1881419898.

The spelling of 36988661 in words is "thirty-six million, nine hundred eighty-eight thousand, six hundred sixty-one".