987611669 has 4 divisors (see below), whose sum is σ = 1077394560. Its totient is φ = 897828780.

The previous prime is 987611663. The next prime is 987611683. The reversal of 987611669 is 966116789.

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 a de Polignac number, because none of the positive numbers 2^k-987611669 is a prime.

It is a super-2 number, since 2×987611669² = 1950753617489931122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 987611669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987611663) 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, 44891429 + ... + 44891450.

It is an arithmetic number, because the mean of its divisors is an integer number (269348640).

Almost surely, 2^987611669 is an apocalyptic number.

It is an amenable number.

987611669 is a deficient number, since it is larger than the sum of its proper divisors (89782891).

987611669 is a wasteful number, since it uses less digits than its factorization.

987611669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89782890.

The product of its digits is 979776, while the sum is 53.

The square root of 987611669 is about 31426.2894564408. The cubic root of 987611669 is about 995.8533856893.

It can be divided in two parts, 9 and 87611669, that added together give a palindrome (87611678).

The spelling of 987611669 in words is "nine hundred eighty-seven million, six hundred eleven thousand, six hundred sixty-nine".