33312397 has 2 divisors, whose sum is σ = 33312398. Its totient is φ = 33312396.

The previous prime is 33312373. The next prime is 33312407. The reversal of 33312397 is 79321333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30316036 + 2996361 = 5506^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 33312397 - 2¹¹ = 33310349 is a prime.

It is a super-2 number, since 2×33312397² = 2219431587771218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33312317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16656198 + 16656199.

It is an arithmetic number, because the mean of its divisors is an integer number (16656199).

Almost surely, 2^33312397 is an apocalyptic number.

It is an amenable number.

33312397 is a deficient number, since it is larger than the sum of its proper divisors (1).

33312397 is an equidigital number, since it uses as much as digits as its factorization.

33312397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 31.

The square root of 33312397 is about 5771.6892674502. The cubic root of 33312397 is about 321.7624013982.

It can be divided in two parts, 3 and 3312397, that added together give a square (3312400 = 1820²).

The spelling of 33312397 in words is "thirty-three million, three hundred twelve thousand, three hundred ninety-seven".