1337840081 has 4 divisors (see below), whose sum is σ = 1339665972. Its totient is φ = 1336014192.

The previous prime is 1337840069. The next prime is 1337840083. The reversal of 1337840081 is 1800487331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1800487331 = 883 ⋅2039057.

It can be written as a sum of positive squares in 2 ways, for example, as 827080081 + 510760000 = 28759^2 + 22600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1337840081 - 2⁶ = 1337840017 is a prime.

It is a super-2 number, since 2×1337840081² = 3579632164660173122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1337840083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911846 + ... + 913311.

It is an arithmetic number, because the mean of its divisors is an integer number (334916493).

Almost surely, 2^1337840081 is an apocalyptic number.

It is an amenable number.

1337840081 is a deficient number, since it is larger than the sum of its proper divisors (1825891).

1337840081 is an equidigital number, since it uses as much as digits as its factorization.

1337840081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825890.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 1337840081 is about 36576.4962920179. The cubic root of 1337840081 is about 1101.8811011451.

The spelling of 1337840081 in words is "one billion, three hundred thirty-seven million, eight hundred forty thousand, eighty-one".