987054091 has 2 divisors, whose sum is σ = 987054092. Its totient is φ = 987054090.

The previous prime is 987054083. The next prime is 987054109. The reversal of 987054091 is 190450789.

Together with next prime (987054109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (190450789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987054091 - 2³ = 987054083 is a prime.

It is not a weakly prime, because it can be changed into another prime (987054041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493527045 + 493527046.

It is an arithmetic number, because the mean of its divisors is an integer number (493527046).

Almost surely, 2^987054091 is an apocalyptic number.

987054091 is a deficient number, since it is larger than the sum of its proper divisors (1).

987054091 is an equidigital number, since it uses as much as digits as its factorization.

987054091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 987054091 is about 31417.4170007657. The cubic root of 987054091 is about 995.6659400616.

The spelling of 987054091 in words is "nine hundred eighty-seven million, fifty-four thousand, ninety-one".