987946721 has 8 divisors (see below), whose sum is σ = 1068318720. Its totient is φ = 910047808.

The previous prime is 987946703. The next prime is 987946733. The reversal of 987946721 is 127649789.

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

It is a de Polignac number, because none of the positive numbers 2^k-987946721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987946121) 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, 617441 + ... + 619038.

It is an arithmetic number, because the mean of its divisors is an integer number (133539840).

Almost surely, 2^987946721 is an apocalyptic number.

It is an amenable number.

987946721 is a deficient number, since it is larger than the sum of its proper divisors (80371999).

987946721 is a wasteful number, since it uses less digits than its factorization.

987946721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236543.

The product of its digits is 1524096, while the sum is 53.

The square root of 987946721 is about 31431.6197641801. The cubic root of 987946721 is about 995.9659889705.

The spelling of 987946721 in words is "nine hundred eighty-seven million, nine hundred forty-six thousand, seven hundred twenty-one".