987906399 has 8 divisors (see below), whose sum is σ = 1317372720. Its totient is φ = 658522176.

The previous prime is 987906383. The next prime is 987906427. The reversal of 987906399 is 993609789.

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

It is not a de Polignac number, because 987906399 - 2⁴ = 987906383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987976399) 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, 17757 + ... + 47865.

It is an arithmetic number, because the mean of its divisors is an integer number (164671590).

Almost surely, 2^987906399 is an apocalyptic number.

987906399 is a deficient number, since it is larger than the sum of its proper divisors (329466321).

987906399 is a wasteful number, since it uses less digits than its factorization.

987906399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41049.

The product of its (nonzero) digits is 6613488, while the sum is 60.

The square root of 987906399 is about 31430.9783334849. The cubic root of 987906399 is about 995.9524390202.

The spelling of 987906399 in words is "nine hundred eighty-seven million, nine hundred six thousand, three hundred ninety-nine".