33987361 has 2 divisors, whose sum is σ = 33987362. Its totient is φ = 33987360.

The previous prime is 33987337. The next prime is 33987383. The reversal of 33987361 is 16378933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24800400 + 9186961 = 4980^2 + 3031^2 .

It is an emirp because it is prime and its reverse (16378933) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33987361 - 2¹¹ = 33985313 is a prime.

It is not a weakly prime, because it can be changed into another prime (33987311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16993680 + 16993681.

It is an arithmetic number, because the mean of its divisors is an integer number (16993681).

Almost surely, 2^33987361 is an apocalyptic number.

It is an amenable number.

33987361 is a deficient number, since it is larger than the sum of its proper divisors (1).

33987361 is an equidigital number, since it uses as much as digits as its factorization.

33987361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 33987361 is about 5829.8680087975. The cubic root of 33987361 is about 323.9210325511.

The spelling of 33987361 in words is "thirty-three million, nine hundred eighty-seven thousand, three hundred sixty-one".