987630664 has 8 divisors (see below), whose sum is σ = 1851807510. Its totient is φ = 493815328.

The previous prime is 987630653. The next prime is 987630667. The reversal of 987630664 is 466036789.

It can be written as a sum of positive squares in only one way, i.e., 563682564 + 423948100 = 23742^2 + 20590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (987630667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61726909 + ... + 61726924.

Almost surely, 2^987630664 is an apocalyptic number.

It is an amenable number.

987630664 is a deficient number, since it is larger than the sum of its proper divisors (864176846).

987630664 is a wasteful number, since it uses less digits than its factorization.

987630664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123453839 (or 123453835 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 987630664 is about 31426.5916701127. The cubic root of 987630664 is about 995.8597701534.

The spelling of 987630664 in words is "nine hundred eighty-seven million, six hundred thirty thousand, six hundred sixty-four".