987766431 has 8 divisors (see below), whose sum is σ = 1335063600. Its totient is φ = 649490112.

The previous prime is 987766391. The next prime is 987766447. The reversal of 987766431 is 134667789.

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

It is not a de Polignac number, because 987766431 - 2¹⁴ = 987750047 is a prime.

It is a super-2 number, since 2×987766431² = 1951365044420955522, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987766531) 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 in 7 ways as a sum of consecutive naturals, for example, 2254956 + ... + 2255393.

It is an arithmetic number, because the mean of its divisors is an integer number (166882950).

Almost surely, 2^987766431 is an apocalyptic number.

987766431 is a deficient number, since it is larger than the sum of its proper divisors (347297169).

987766431 is a wasteful number, since it uses less digits than its factorization.

987766431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510425.

The product of its digits is 1524096, while the sum is 51.

The square root of 987766431 is about 31428.7516614962. The cubic root of 987766431 is about 995.9054008071.

The spelling of 987766431 in words is "nine hundred eighty-seven million, seven hundred sixty-six thousand, four hundred thirty-one".