55033987 has 2 divisors, whose sum is σ = 55033988. Its totient is φ = 55033986.

The previous prime is 55033973. The next prime is 55033997. The reversal of 55033987 is 78933055.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55033987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55033907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27516993 + 27516994.

It is an arithmetic number, because the mean of its divisors is an integer number (27516994).

Almost surely, 2^55033987 is an apocalyptic number.

55033987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55033987 is an equidigital number, since it uses as much as digits as its factorization.

55033987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 55033987 is about 7418.4895362870. The cubic root of 55033987 is about 380.3735638525.

The spelling of 55033987 in words is "fifty-five million, thirty-three thousand, nine hundred eighty-seven".