987271493 has 8 divisors (see below), whose sum is σ = 1066375128. Its totient is φ = 908619264.

The previous prime is 987271487. The next prime is 987271501. The reversal of 987271493 is 394172789.

It can be written as a sum of positive squares in 4 ways, for example, as 17447329 + 969824164 = 4177^2 + 31142^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 987271493 - 2¹⁸ = 987009349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987271423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108296 + ... + 117057.

It is an arithmetic number, because the mean of its divisors is an integer number (133296891).

Almost surely, 2^987271493 is an apocalyptic number.

It is an amenable number.

987271493 is a deficient number, since it is larger than the sum of its proper divisors (79103635).

987271493 is a wasteful number, since it uses less digits than its factorization.

987271493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225703.

The product of its digits is 762048, while the sum is 50.

The square root of 987271493 is about 31420.8767064193. The cubic root of 987271493 is about 995.7390342917.

The spelling of 987271493 in words is "nine hundred eighty-seven million, two hundred seventy-one thousand, four hundred ninety-three".