987817946 has 16 divisors (see below), whose sum is σ = 1575633384. Its totient is φ = 462856704.

The previous prime is 987817939. The next prime is 987817949. The reversal of 987817946 is 649718789.

It can be written as a sum of positive squares in 4 ways, for example, as 712623025 + 275194921 = 26695^2 + 16589^2 .

It is not an unprimeable number, because it can be changed into a prime (987817949) 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, 54425 + ... + 70268.

Almost surely, 2^987817946 is an apocalyptic number.

987817946 is a deficient number, since it is larger than the sum of its proper divisors (587815438).

987817946 is a wasteful number, since it uses less digits than its factorization.

987817946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124945.

The product of its digits is 6096384, while the sum is 59.

The square root of 987817946 is about 31429.5712029293. The cubic root of 987817946 is about 995.9227136634.

The spelling of 987817946 in words is "nine hundred eighty-seven million, eight hundred seventeen thousand, nine hundred forty-six".