1320489139 has 4 divisors (see below), whose sum is σ = 1320855256. Its totient is φ = 1320123024.

The previous prime is 1320489097. The next prime is 1320489211. The reversal of 1320489139 is 9319840231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320489139 - 2²⁵ = 1286934707 is a prime.

It is a super-2 number, since 2×1320489139² = 3487383132433922642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320489539) 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, 177594 + ... + 184879.

It is an arithmetic number, because the mean of its divisors is an integer number (330213814).

Almost surely, 2^1320489139 is an apocalyptic number.

1320489139 is a deficient number, since it is larger than the sum of its proper divisors (366117).

1320489139 is an equidigital number, since it uses as much as digits as its factorization.

1320489139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366116.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1320489139 is about 36338.5351796134. The cubic root of 1320489139 is about 1097.0967903591.

The spelling of 1320489139 in words is "one billion, three hundred twenty million, four hundred eighty-nine thousand, one hundred thirty-nine".