33013987 has 2 divisors, whose sum is σ = 33013988. Its totient is φ = 33013986.

The previous prime is 33013973. The next prime is 33013991. The reversal of 33013987 is 78931033.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33013987 is a prime.

It is not a weakly prime, because it can be changed into another prime (33013957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16506993 + 16506994.

It is an arithmetic number, because the mean of its divisors is an integer number (16506994).

Almost surely, 2^33013987 is an apocalyptic number.

33013987 is a deficient number, since it is larger than the sum of its proper divisors (1).

33013987 is an equidigital number, since it uses as much as digits as its factorization.

33013987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 33013987 is about 5745.7799296527. The cubic root of 33013987 is about 320.7987435508.

The spelling of 33013987 in words is "thirty-three million, thirteen thousand, nine hundred eighty-seven".