33720413 has 2 divisors, whose sum is σ = 33720414. Its totient is φ = 33720412.

The previous prime is 33720403. The next prime is 33720437. The reversal of 33720413 is 31402733.

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., 32684089 + 1036324 = 5717^2 + 1018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33720413 is a prime.

It is a super-2 number, since 2×33720413² = 2274132505781138, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33720403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16860206 + 16860207.

It is an arithmetic number, because the mean of its divisors is an integer number (16860207).

Almost surely, 2^33720413 is an apocalyptic number.

It is an amenable number.

33720413 is a deficient number, since it is larger than the sum of its proper divisors (1).

33720413 is an equidigital number, since it uses as much as digits as its factorization.

33720413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 33720413 is about 5806.9280174633. The cubic root of 33720413 is about 323.0707414379.

The spelling of 33720413 in words is "thirty-three million, seven hundred twenty thousand, four hundred thirteen".