33009997 has 2 divisors, whose sum is σ = 33009998. Its totient is φ = 33009996.

The previous prime is 33009989. The next prime is 33010007. The reversal of 33009997 is 79990033.

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., 32592681 + 417316 = 5709^2 + 646^2 .

It is a cyclic number.

It is not a de Polignac number, because 33009997 - 2³ = 33009989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33019997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16504998 + 16504999.

It is an arithmetic number, because the mean of its divisors is an integer number (16504999).

Almost surely, 2^33009997 is an apocalyptic number.

It is an amenable number.

33009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33009997 is an equidigital number, since it uses as much as digits as its factorization.

33009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 33009997 is about 5745.4327078124. The cubic root of 33009997 is about 320.7858193463.

The spelling of 33009997 in words is "thirty-three million, nine thousand, nine hundred ninety-seven".