33745381 has 2 divisors, whose sum is σ = 33745382. Its totient is φ = 33745380.

The previous prime is 33745379. The next prime is 33745409. The reversal of 33745381 is 18354733.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33744481 + 900 = 5809^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 33745381 - 2¹ = 33745379 is a prime.

It is a super-2 number, since 2×33745381² = 2277501477670322, which contains 22 as substring.

Together with 33745379, it forms a pair of twin primes.

It is equal to p_2074696 and since 33745381 and 2074696 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33745321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16872690 + 16872691.

It is an arithmetic number, because the mean of its divisors is an integer number (16872691).

Almost surely, 2^33745381 is an apocalyptic number.

It is an amenable number.

33745381 is a deficient number, since it is larger than the sum of its proper divisors (1).

33745381 is an equidigital number, since it uses as much as digits as its factorization.

33745381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 33745381 is about 5809.0774654845. The cubic root of 33745381 is about 323.1504601154.

The spelling of 33745381 in words is "thirty-three million, seven hundred forty-five thousand, three hundred eighty-one".