987553953 has 24 divisors (see below), whose sum is σ = 1545511968. Its totient is φ = 605227392.

The previous prime is 987553943. The next prime is 987553969. The reversal of 987553953 is 359355789.

It is a happy number.

987553953 is a `hidden beast` number, since 9 + 87 + 553 + 9 + 5 + 3 = 666.

987553953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 987553953 - 2²⁹ = 450683041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987553953.

It is not an unprimeable number, because it can be changed into a prime (987553913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68475 + ... + 81632.

It is an arithmetic number, because the mean of its divisors is an integer number (64396332).

Almost surely, 2^987553953 is an apocalyptic number.

It is an amenable number.

987553953 is a deficient number, since it is larger than the sum of its proper divisors (557958015).

987553953 is a wasteful number, since it uses less digits than its factorization.

987553953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150173 (or 150170 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 54.

The square root of 987553953 is about 31425.3711672591. The cubic root of 987553953 is about 995.8339860961.

The spelling of 987553953 in words is "nine hundred eighty-seven million, five hundred fifty-three thousand, nine hundred fifty-three".