987264921 has 16 divisors (see below), whose sum is σ = 1336025600. Its totient is φ = 648362880.

The previous prime is 987264829. The next prime is 987264937. The reversal of 987264921 is 129462789.

It is not a de Polignac number, because 987264921 - 2⁷ = 987264793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987264961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214755 + ... + 219303.

It is an arithmetic number, because the mean of its divisors is an integer number (83501600).

Almost surely, 2^987264921 is an apocalyptic number.

It is an amenable number.

987264921 is a deficient number, since it is larger than the sum of its proper divisors (348760679).

987264921 is a wasteful number, since it uses less digits than its factorization.

987264921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616.

The product of its digits is 435456, while the sum is 48.

The square root of 987264921 is about 31420.7721260952. The cubic root of 987264921 is about 995.7368248314.

The spelling of 987264921 in words is "nine hundred eighty-seven million, two hundred sixty-four thousand, nine hundred twenty-one".