33129961 has 8 divisors (see below), whose sum is σ = 33493824. Its totient is φ = 32768400.

The previous prime is 33129881. The next prime is 33129973. The reversal of 33129961 is 16992133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33129961 - 2¹⁵ = 33097193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33120961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46911 + ... + 47611.

It is an arithmetic number, because the mean of its divisors is an integer number (4186728).

Almost surely, 2^33129961 is an apocalyptic number.

It is an amenable number.

33129961 is a deficient number, since it is larger than the sum of its proper divisors (363863).

33129961 is a wasteful number, since it uses less digits than its factorization.

33129961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its digits is 8748, while the sum is 34.

The square root of 33129961 is about 5755.8631846145. The cubic root of 33129961 is about 321.1739464772.

The spelling of 33129961 in words is "thirty-three million, one hundred twenty-nine thousand, nine hundred sixty-one".