33645973 has 2 divisors, whose sum is σ = 33645974. Its totient is φ = 33645972.

The previous prime is 33645961. The next prime is 33646001. The reversal of 33645973 is 37954633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25020004 + 8625969 = 5002^2 + 2937^2 .

It is a cyclic number.

It is not a de Polignac number, because 33645973 - 2²⁵ = 91541 is a prime.

It is a super-2 number, since 2×33645973² = 2264102998233458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33645673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16822986 + 16822987.

It is an arithmetic number, because the mean of its divisors is an integer number (16822987).

Almost surely, 2^33645973 is an apocalyptic number.

It is an amenable number.

33645973 is a deficient number, since it is larger than the sum of its proper divisors (1).

33645973 is an equidigital number, since it uses as much as digits as its factorization.

33645973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 40.

The square root of 33645973 is about 5800.5148909386. The cubic root of 33645973 is about 322.8328330767.

The spelling of 33645973 in words is "thirty-three million, six hundred forty-five thousand, nine hundred seventy-three".