33397961 has 4 divisors (see below), whose sum is σ = 33820800. Its totient is φ = 32975124.

The previous prime is 33397957. The next prime is 33397963. The reversal of 33397961 is 16979333.

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.

It is a cyclic number.

It is not a de Polignac number, because 33397961 - 2² = 33397957 is a prime.

It is a super-2 number, since 2×33397961² = 2230847597915042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33397963) 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, 211301 + ... + 211458.

It is an arithmetic number, because the mean of its divisors is an integer number (8455200).

Almost surely, 2^33397961 is an apocalyptic number.

It is an amenable number.

33397961 is a deficient number, since it is larger than the sum of its proper divisors (422839).

33397961 is an equidigital number, since it uses as much as digits as its factorization.

33397961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422838.

The product of its digits is 91854, while the sum is 41.

The square root of 33397961 is about 5779.0969017659. The cubic root of 33397961 is about 322.0376516804.

The spelling of 33397961 in words is "thirty-three million, three hundred ninety-seven thousand, nine hundred sixty-one".