33381493 has 2 divisors, whose sum is σ = 33381494. Its totient is φ = 33381492.

The previous prime is 33381479. The next prime is 33381527. The reversal of 33381493 is 39418333.

It is an a-pointer prime, because the next prime (33381527) can be obtained adding 33381493 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23882769 + 9498724 = 4887^2 + 3082^2 .

It is a cyclic number.

It is not a de Polignac number, because 33381493 - 2¹⁷ = 33250421 is a prime.

It is a super-2 number, since 2×33381493² = 2228648149818098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33381193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16690746 + 16690747.

It is an arithmetic number, because the mean of its divisors is an integer number (16690747).

Almost surely, 2^33381493 is an apocalyptic number.

It is an amenable number.

33381493 is a deficient number, since it is larger than the sum of its proper divisors (1).

33381493 is an equidigital number, since it uses as much as digits as its factorization.

33381493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 33381493 is about 5777.6719359964. The cubic root of 33381493 is about 321.9847124411.

The spelling of 33381493 in words is "thirty-three million, three hundred eighty-one thousand, four hundred ninety-three".