979006781 has 2 divisors, whose sum is σ = 979006782. Its totient is φ = 979006780.

The previous prime is 979006739. The next prime is 979006783. The reversal of 979006781 is 187600979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 952277881 + 26728900 = 30859^2 + 5170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979006781 is a prime.

It is a super-2 number, since 2×979006781² = 1916908554487963922, which contains 22 as substring.

Together with 979006783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979006783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489503390 + 489503391.

It is an arithmetic number, because the mean of its divisors is an integer number (489503391).

Almost surely, 2^979006781 is an apocalyptic number.

It is an amenable number.

979006781 is a deficient number, since it is larger than the sum of its proper divisors (1).

979006781 is an equidigital number, since it uses as much as digits as its factorization.

979006781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 979006781 is about 31289.0840549863. The cubic root of 979006781 is about 992.9527127417.

The spelling of 979006781 in words is "nine hundred seventy-nine million, six thousand, seven hundred eighty-one".