987982289797 has 4 divisors (see below), whose sum is σ = 987990742720. Its totient is φ = 987973836876.

The previous prime is 987982289783. The next prime is 987982289837. The reversal of 987982289797 is 797982289789.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 987982289797 - 2¹⁵ = 987982257029 is a prime.

It is a super-2 number, since 2×987982289797² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987982287797) 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, 4048647 + ... + 4285732.

It is an arithmetic number, because the mean of its divisors is an integer number (246997685680).

Almost surely, 2^987982289797 is an apocalyptic number.

It is an amenable number.

987982289797 is a deficient number, since it is larger than the sum of its proper divisors (8452923).

987982289797 is a wasteful number, since it uses less digits than its factorization.

987982289797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452922.

The product of its digits is 4608866304, while the sum is 85.

The spelling of 987982289797 in words is "nine hundred eighty-seven billion, nine hundred eighty-two million, two hundred eighty-nine thousand, seven hundred ninety-seven".