554191987 has 2 divisors, whose sum is σ = 554191988. Its totient is φ = 554191986.

The previous prime is 554191931. The next prime is 554191999. The reversal of 554191987 is 789191455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 554191987 - 2¹⁵ = 554159219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 554191987.

It is not a weakly prime, because it can be changed into another prime (554191927) 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, 277095993 + 277095994.

It is an arithmetic number, because the mean of its divisors is an integer number (277095994).

Almost surely, 2^554191987 is an apocalyptic number.

554191987 is a deficient number, since it is larger than the sum of its proper divisors (1).

554191987 is an equidigital number, since it uses as much as digits as its factorization.

554191987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 49.

The square root of 554191987 is about 23541.2826116166. The cubic root of 554191987 is about 821.3975705877.

The spelling of 554191987 in words is "five hundred fifty-four million, one hundred ninety-one thousand, nine hundred eighty-seven".