33972661 has 4 divisors (see below), whose sum is σ = 33995052. Its totient is φ = 33950272.

The previous prime is 33972611. The next prime is 33972671. The reversal of 33972661 is 16627933.

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 4704561 + 29268100 = 2169^2 + 5410^2 .

It is a cyclic number.

It is not a de Polignac number, because 33972661 - 2¹⁷ = 33841589 is a prime.

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 33972661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33972611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8740 + ... + 12013.

It is an arithmetic number, because the mean of its divisors is an integer number (8498763).

Almost surely, 2^33972661 is an apocalyptic number.

It is an amenable number.

33972661 is a deficient number, since it is larger than the sum of its proper divisors (22391).

33972661 is a wasteful number, since it uses less digits than its factorization.

33972661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22390.

The product of its digits is 40824, while the sum is 37.

The square root of 33972661 is about 5828.6071234901. The cubic root of 33972661 is about 323.8743257195.

The spelling of 33972661 in words is "thirty-three million, nine hundred seventy-two thousand, six hundred sixty-one".