1339131481 has 2 divisors, whose sum is σ = 1339131482. Its totient is φ = 1339131480.

The previous prime is 1339131439. The next prime is 1339131503. The reversal of 1339131481 is 1841319331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 850014025 + 489117456 = 29155^2 + 22116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1339131481 - 2²¹ = 1337034329 is a prime.

It is a super-2 number, since 2×1339131481² = 3586546246810506722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1339131181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669565740 + 669565741.

It is an arithmetic number, because the mean of its divisors is an integer number (669565741).

Almost surely, 2^1339131481 is an apocalyptic number.

It is an amenable number.

1339131481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339131481 is an equidigital number, since it uses as much as digits as its factorization.

1339131481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 1339131481 is about 36594.1454470520. The cubic root of 1339131481 is about 1102.2355310608.

The spelling of 1339131481 in words is "one billion, three hundred thirty-nine million, one hundred thirty-one thousand, four hundred eighty-one".