987478147 has 2 divisors, whose sum is σ = 987478148. Its totient is φ = 987478146.

The previous prime is 987478109. The next prime is 987478169. The reversal of 987478147 is 741874789.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 987478147 - 2¹⁹ = 986953859 is a prime.

It is a super-2 number, since 2×987478147² = 1950226181605107218, which contains 22 as substring.

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

It is not a weakly prime, because it can be changed into another prime (987478747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493739073 + 493739074.

It is an arithmetic number, because the mean of its divisors is an integer number (493739074).

Almost surely, 2^987478147 is an apocalyptic number.

987478147 is a deficient number, since it is larger than the sum of its proper divisors (1).

987478147 is an equidigital number, since it uses as much as digits as its factorization.

987478147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 55.

The square root of 987478147 is about 31424.1650167510. The cubic root of 987478147 is about 995.8085049152.

The spelling of 987478147 in words is "nine hundred eighty-seven million, four hundred seventy-eight thousand, one hundred forty-seven".