987664051 has 8 divisors (see below), whose sum is σ = 1106572464. Its totient is φ = 873609120.

The previous prime is 987664043. The next prime is 987664081. The reversal of 987664051 is 150466789.

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 987664051 - 2³ = 987664043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987663992 and 987664010.

It is not an unprimeable number, because it can be changed into a prime (987664001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212940 + ... + 1213753.

It is an arithmetic number, because the mean of its divisors is an integer number (138321558).

Almost surely, 2^987664051 is an apocalyptic number.

987664051 is a deficient number, since it is larger than the sum of its proper divisors (118908413).

987664051 is a wasteful number, since it uses less digits than its factorization.

987664051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426741.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 987664051 is about 31427.1228559027. The cubic root of 987664051 is about 995.8709917557.

The spelling of 987664051 in words is "nine hundred eighty-seven million, six hundred sixty-four thousand, fifty-one".