36972861 has 4 divisors (see below), whose sum is σ = 49297152. Its totient is φ = 24648572.

The previous prime is 36972847. The next prime is 36972877. The reversal of 36972861 is 16827963.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16827963 = 3 ⋅5609321.

It is a cyclic number.

It is not a de Polignac number, because 36972861 - 2⁵ = 36972829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36972961) 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, 6162141 + ... + 6162146.

It is an arithmetic number, because the mean of its divisors is an integer number (12324288).

Almost surely, 2^36972861 is an apocalyptic number.

It is an amenable number.

36972861 is a deficient number, since it is larger than the sum of its proper divisors (12324291).

36972861 is a wasteful number, since it uses less digits than its factorization.

36972861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12324290.

The product of its digits is 108864, while the sum is 42.

The square root of 36972861 is about 6080.5313090223. The cubic root of 36972861 is about 333.1406939138.

The spelling of 36972861 in words is "thirty-six million, nine hundred seventy-two thousand, eight hundred sixty-one".