987649311 has 12 divisors (see below), whose sum is σ = 1447464536. Its totient is φ = 598575120.

The previous prime is 987649307. The next prime is 987649319. The reversal of 987649311 is 113946789.

It is a happy number.

It is not a de Polignac number, because 987649311 - 2² = 987649307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987649319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1360036 + ... + 1360761.

Almost surely, 2^987649311 is an apocalyptic number.

987649311 is a deficient number, since it is larger than the sum of its proper divisors (459815225).

987649311 is a wasteful number, since it uses less digits than its factorization.

987649311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720822 (or 2720811 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 987649311 is about 31426.8883442189. Note that the first 3 decimals coincide. The cubic root of 987649311 is about 995.8660375706.

The spelling of 987649311 in words is "nine hundred eighty-seven million, six hundred forty-nine thousand, three hundred eleven".