987946634 has 4 divisors (see below), whose sum is σ = 1481919954. Its totient is φ = 493973316.

The previous prime is 987946633. The next prime is 987946637. The reversal of 987946634 is 436649789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 623251225 + 364695409 = 24965^2 + 19097^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 987946634.

It is not an unprimeable number, because it can be changed into a prime (987946633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246986657 + ... + 246986660.

Almost surely, 2^987946634 is an apocalyptic number.

987946634 is a deficient number, since it is larger than the sum of its proper divisors (493973320).

987946634 is a wasteful number, since it uses less digits than its factorization.

987946634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493973319.

The product of its digits is 7838208, while the sum is 56.

The square root of 987946634 is about 31431.6183802234. The cubic root of 987946634 is about 995.9659597351.

The spelling of 987946634 in words is "nine hundred eighty-seven million, nine hundred forty-six thousand, six hundred thirty-four".