981481339 has 2 divisors, whose sum is σ = 981481340. Its totient is φ = 981481338.

The previous prime is 981481313. The next prime is 981481393. The reversal of 981481339 is 933184189.

It is a happy number.

Together with next prime (981481393) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981481339 - 2¹⁷ = 981350267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981482339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490740669 + 490740670.

It is an arithmetic number, because the mean of its divisors is an integer number (490740670).

Almost surely, 2^981481339 is an apocalyptic number.

981481339 is a deficient number, since it is larger than the sum of its proper divisors (1).

981481339 is an equidigital number, since it uses as much as digits as its factorization.

981481339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 981481339 is about 31328.6025701754. The cubic root of 981481339 is about 993.7886115346.

It can be divided in two parts, 9814 and 81339, that multiplied together give a triangular number (798260946 = T₃₉₉₅₆).

The spelling of 981481339 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, three hundred thirty-nine".