33117997 has 8 divisors (see below), whose sum is σ = 37105632. Its totient is φ = 29293200.

The previous prime is 33117977. The next prime is 33118039. The reversal of 33117997 is 79971133.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33117997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33117947) 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, 40279 + ... + 41092.

It is an arithmetic number, because the mean of its divisors is an integer number (4638204).

Almost surely, 2^33117997 is an apocalyptic number.

33117997 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

33117997 is a deficient number, since it is larger than the sum of its proper divisors (3987635).

33117997 is a wasteful number, since it uses less digits than its factorization.

33117997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81419.

The product of its digits is 35721, while the sum is 40.

The square root of 33117997 is about 5754.8238026894. The cubic root of 33117997 is about 321.1352806934.

The spelling of 33117997 in words is "thirty-three million, one hundred seventeen thousand, nine hundred ninety-seven".