33145397 has 2 divisors, whose sum is σ = 33145398. Its totient is φ = 33145396.

The previous prime is 33145391. The next prime is 33145421. The reversal of 33145397 is 79354133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33016516 + 128881 = 5746^2 + 359^2 .

It is an emirp because it is prime and its reverse (79354133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33145397 - 2⁸ = 33145141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33145391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16572698 + 16572699.

It is an arithmetic number, because the mean of its divisors is an integer number (16572699).

Almost surely, 2^33145397 is an apocalyptic number.

It is an amenable number.

33145397 is a deficient number, since it is larger than the sum of its proper divisors (1).

33145397 is an equidigital number, since it uses as much as digits as its factorization.

33145397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 35.

The square root of 33145397 is about 5757.2039220441. The cubic root of 33145397 is about 321.2238194736.

The spelling of 33145397 in words is "thirty-three million, one hundred forty-five thousand, three hundred ninety-seven".