987445544779 has 2 divisors, whose sum is σ = 987445544780. Its totient is φ = 987445544778.

The previous prime is 987445544777. The next prime is 987445544803. The reversal of 987445544779 is 977445544789.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 987445544779 - 2¹ = 987445544777 is a prime.

Together with 987445544777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (987445544777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493722772389 + 493722772390.

It is an arithmetic number, because the mean of its divisors is an integer number (493722772390).

Almost surely, 2^987445544779 is an apocalyptic number.

987445544779 is a deficient number, since it is larger than the sum of its proper divisors (1).

987445544779 is an equidigital number, since it uses as much as digits as its factorization.

987445544779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1422489600, while the sum is 73.

The spelling of 987445544779 in words is "nine hundred eighty-seven billion, four hundred forty-five million, five hundred forty-four thousand, seven hundred seventy-nine".