987522991 has 8 divisors (see below), whose sum is σ = 1215413024. Its totient is φ = 781336800.

The previous prime is 987522959. The next prime is 987523001. The reversal of 987522991 is 199225789.

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 987522991 - 2⁵ = 987522959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987022991) 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, 5425860 + ... + 5426041.

It is an arithmetic number, because the mean of its divisors is an integer number (151926628).

Almost surely, 2^987522991 is an apocalyptic number.

987522991 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

987522991 is a deficient number, since it is larger than the sum of its proper divisors (227890033).

987522991 is a wasteful number, since it uses less digits than its factorization.

987522991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851921.

The product of its digits is 816480, while the sum is 52.

The square root of 987522991 is about 31424.8785359626. The cubic root of 987522991 is about 995.8235787883.

The spelling of 987522991 in words is "nine hundred eighty-seven million, five hundred twenty-two thousand, nine hundred ninety-one".