987052109 has 4 divisors (see below), whose sum is σ = 1039002240. Its totient is φ = 935101980.

The previous prime is 987052063. The next prime is 987052117. The reversal of 987052109 is 901250789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 987052109 - 2²⁰ = 986003533 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987052609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25975037 + ... + 25975074.

It is an arithmetic number, because the mean of its divisors is an integer number (259750560).

Almost surely, 2^987052109 is an apocalyptic number.

It is an amenable number.

987052109 is a deficient number, since it is larger than the sum of its proper divisors (51950131).

987052109 is a wasteful number, since it uses less digits than its factorization.

987052109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51950130.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 987052109 is about 31417.3854577366. The cubic root of 987052109 is about 995.6652736303.

The spelling of 987052109 in words is "nine hundred eighty-seven million, fifty-two thousand, one hundred nine".