987949 has 4 divisors (see below), whose sum is σ = 999936. Its totient is φ = 975964.

The previous prime is 987941. The next prime is 987971. The reversal of 987949 is 949789.

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 987949 - 2³ = 987941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987899 and 987908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5869 + ... + 6034.

It is an arithmetic number, because the mean of its divisors is an integer number (249984).

2⁹⁸⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

987949 is a deficient number, since it is larger than the sum of its proper divisors (11987).

987949 is a wasteful number, since it uses less digits than its factorization.

987949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11986.

The product of its digits is 163296, while the sum is 46.

The square root of 987949 is about 993.9562364611. The cubic root of 987949 is about 99.5966754803.

It can be divided in two parts, 987 and 949, that added together give a square (1936 = 44²).

The spelling of 987949 in words is "nine hundred eighty-seven thousand, nine hundred forty-nine".