987940799 has 4 divisors (see below), whose sum is σ = 1008960864. Its totient is φ = 966920736.

The previous prime is 987940787. The next prime is 987940801. The reversal of 987940799 is 997049789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997049789 = 4007 ⋅248827.

It is a cyclic number.

It is not a de Polignac number, because 987940799 - 2⁸ = 987940543 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 (987940099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10509962 + ... + 10510055.

It is an arithmetic number, because the mean of its divisors is an integer number (252240216).

Almost surely, 2^987940799 is an apocalyptic number.

987940799 is a deficient number, since it is larger than the sum of its proper divisors (21020065).

987940799 is a wasteful number, since it uses less digits than its factorization.

987940799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21020064.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The square root of 987940799 is about 31431.5255595397. The cubic root of 987940799 is about 995.9639989434.

The spelling of 987940799 in words is "nine hundred eighty-seven million, nine hundred forty thousand, seven hundred ninety-nine".