1339895081 has 4 divisors (see below), whose sum is σ = 1531308672. Its totient is φ = 1148481492.

The previous prime is 1339895041. The next prime is 1339895099. The reversal of 1339895081 is 1805989331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1339895081 - 2⁶ = 1339895017 is a prime.

It is a super-2 number, since 2×1339895081² = 3590637656175993122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1339895041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95706785 + ... + 95706798.

It is an arithmetic number, because the mean of its divisors is an integer number (382827168).

Almost surely, 2^1339895081 is an apocalyptic number.

It is an amenable number.

1339895081 is a deficient number, since it is larger than the sum of its proper divisors (191413591).

1339895081 is an equidigital number, since it uses as much as digits as its factorization.

1339895081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191413590.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 1339895081 is about 36604.5773230617. The cubic root of 1339895081 is about 1102.4449969560. Note that the first 3 decimals are identical.

The spelling of 1339895081 in words is "one billion, three hundred thirty-nine million, eight hundred ninety-five thousand, eighty-one".