33987841 has 2 divisors, whose sum is σ = 33987842. Its totient is φ = 33987840.

The previous prime is 33987839. The next prime is 33987847. The reversal of 33987841 is 14878933.

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., 32821441 + 1166400 = 5729^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 33987841 - 2¹ = 33987839 is a prime.

Together with 33987839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (33987847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16993920 + 16993921.

It is an arithmetic number, because the mean of its divisors is an integer number (16993921).

Almost surely, 2^33987841 is an apocalyptic number.

It is an amenable number.

33987841 is a deficient number, since it is larger than the sum of its proper divisors (1).

33987841 is an equidigital number, since it uses as much as digits as its factorization.

33987841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 33987841 is about 5829.9091759649. The cubic root of 33987841 is about 323.9225574450.

The spelling of 33987841 in words is "thirty-three million, nine hundred eighty-seven thousand, eight hundred forty-one".