33661997 has 2 divisors, whose sum is σ = 33661998. Its totient is φ = 33661996.

The previous prime is 33661993. The next prime is 33662017. The reversal of 33661997 is 79916633.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19061956 + 14600041 = 4366^2 + 3821^2 .

It is a cyclic number.

It is not a de Polignac number, because 33661997 - 2² = 33661993 is a prime.

It is a super-2 number, since 2×33661997² = 2266260084056018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33661993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16830998 + 16830999.

It is an arithmetic number, because the mean of its divisors is an integer number (16830999).

Almost surely, 2^33661997 is an apocalyptic number.

It is an amenable number.

33661997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33661997 is an equidigital number, since it uses as much as digits as its factorization.

33661997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 44.

The square root of 33661997 is about 5801.8959832110. The cubic root of 33661997 is about 322.8840749921.

The spelling of 33661997 in words is "thirty-three million, six hundred sixty-one thousand, nine hundred ninety-seven".