987019961 has 8 divisors (see below), whose sum is σ = 1048502400. Its totient is φ = 926490960.

The previous prime is 987019951. The next prime is 987019963. The reversal of 987019961 is 169910789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 987019961 - 2¹⁰ = 987018937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (987019963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236225 + ... + 240366.

It is an arithmetic number, because the mean of its divisors is an integer number (131062800).

Almost surely, 2^987019961 is an apocalyptic number.

It is an amenable number.

987019961 is a deficient number, since it is larger than the sum of its proper divisors (61482439).

987019961 is a wasteful number, since it uses less digits than its factorization.

987019961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476719.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 987019961 is about 31416.8738260190. The cubic root of 987019961 is about 995.6544640035.

The spelling of 987019961 in words is "nine hundred eighty-seven million, nineteen thousand, nine hundred sixty-one".