987054109 has 2 divisors, whose sum is σ = 987054110. Its totient is φ = 987054108.

The previous prime is 987054091. The next prime is 987054127. The reversal of 987054109 is 901450789.

Together with previous prime (987054091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (987054091) and next prime (987054127).

It can be written as a sum of positive squares in only one way, i.e., 976750009 + 10304100 = 31253^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 987054109 - 2⁵ = 987054077 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987054149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493527054 + 493527055.

It is an arithmetic number, because the mean of its divisors is an integer number (493527055).

Almost surely, 2^987054109 is an apocalyptic number.

It is an amenable number.

987054109 is a deficient number, since it is larger than the sum of its proper divisors (1).

987054109 is an equidigital number, since it uses as much as digits as its factorization.

987054109 is an evil number, because the sum of its binary digits is even.

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

The square root of 987054109 is about 31417.4172872310. The cubic root of 987054109 is about 995.6659461139.

The spelling of 987054109 in words is "nine hundred eighty-seven million, fifty-four thousand, one hundred nine".