986941781879 has 2 divisors, whose sum is σ = 986941781880. Its totient is φ = 986941781878.

The previous prime is 986941781789. The next prime is 986941781921. The reversal of 986941781879 is 978187149689.

Together with previous prime (986941781789) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-986941781879 is a prime.

It is a super-2 number, since 2×986941781879² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986941789879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493470890939 + 493470890940.

It is an arithmetic number, because the mean of its divisors is an integer number (493470890940).

Almost surely, 2^986941781879 is an apocalyptic number.

986941781879 is a deficient number, since it is larger than the sum of its proper divisors (1).

986941781879 is an equidigital number, since it uses as much as digits as its factorization.

986941781879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 438939648, while the sum is 77.

The spelling of 986941781879 in words is "nine hundred eighty-six billion, nine hundred forty-one million, seven hundred eighty-one thousand, eight hundred seventy-nine".