981384013 has 2 divisors, whose sum is σ = 981384014. Its totient is φ = 981384012.

The previous prime is 981383929. The next prime is 981384023. The reversal of 981384013 is 310483189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958707369 + 22676644 = 30963^2 + 4762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981384013 is a prime.

It is a super-2 number, since 2×981384013² = 1926229161943968338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981384023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490692006 + 490692007.

It is an arithmetic number, because the mean of its divisors is an integer number (490692007).

Almost surely, 2^981384013 is an apocalyptic number.

It is an amenable number.

981384013 is a deficient number, since it is larger than the sum of its proper divisors (1).

981384013 is an equidigital number, since it uses as much as digits as its factorization.

981384013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 981384013 is about 31327.0492226766. The cubic root of 981384013 is about 993.7557616427.

The spelling of 981384013 in words is "nine hundred eighty-one million, three hundred eighty-four thousand, thirteen".