985078331 has 2 divisors, whose sum is σ = 985078332. Its totient is φ = 985078330.

The previous prime is 985078327. The next prime is 985078333. The reversal of 985078331 is 133870589.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 985078331 - 2² = 985078327 is a prime.

It is a super-2 number, since 2×985078331² = 1940758636411491122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 985078333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (985078333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492539165 + 492539166.

It is an arithmetic number, because the mean of its divisors is an integer number (492539166).

Almost surely, 2^985078331 is an apocalyptic number.

985078331 is a deficient number, since it is larger than the sum of its proper divisors (1).

985078331 is an equidigital number, since it uses as much as digits as its factorization.

985078331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 985078331 is about 31385.9575447365. The cubic root of 985078331 is about 995.0011636056.

The spelling of 985078331 in words is "nine hundred eighty-five million, seventy-eight thousand, three hundred thirty-one".