33397121 has 2 divisors, whose sum is σ = 33397122. Its totient is φ = 33397120.

The previous prime is 33397093. The next prime is 33397139. The reversal of 33397121 is 12179333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20830096 + 12567025 = 4564^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 33397121 - 2¹⁸ = 33134977 is a prime.

It is a super-3 number, since 3×33397121³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33397141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16698560 + 16698561.

It is an arithmetic number, because the mean of its divisors is an integer number (16698561).

Almost surely, 2^33397121 is an apocalyptic number.

It is an amenable number.

33397121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33397121 is an equidigital number, since it uses as much as digits as its factorization.

33397121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 29.

The square root of 33397121 is about 5779.0242255938. The cubic root of 33397121 is about 322.0349517761.

The spelling of 33397121 in words is "thirty-three million, three hundred ninety-seven thousand, one hundred twenty-one".