987444877 has 4 divisors (see below), whose sum is σ = 1039415680. Its totient is φ = 935474076.

The previous prime is 987444869. The next prime is 987444883. The reversal of 987444877 is 778444789.

It is a happy number.

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 987444877 - 2³ = 987444869 is a prime.

It is a super-2 number, since 2×987444877² = 1950094770227090258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987444817) 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, 25985373 + ... + 25985410.

It is an arithmetic number, because the mean of its divisors is an integer number (259853920).

Almost surely, 2^987444877 is an apocalyptic number.

It is an amenable number.

987444877 is a deficient number, since it is larger than the sum of its proper divisors (51970803).

987444877 is a wasteful number, since it uses less digits than its factorization.

987444877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51970802.

The product of its digits is 12644352, while the sum is 58.

The square root of 987444877 is about 31423.6356426178. The cubic root of 987444877 is about 995.7973212345.

The spelling of 987444877 in words is "nine hundred eighty-seven million, four hundred forty-four thousand, eight hundred seventy-seven".