1320434091 has 24 divisors (see below), whose sum is σ = 1922718096. Its totient is φ = 873195840.

The previous prime is 1320434077. The next prime is 1320434099. The reversal of 1320434091 is 1904340231.

It is not a de Polignac number, because 1320434091 - 2⁷ = 1320433963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320434099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1028536 + ... + 1029818.

It is an arithmetic number, because the mean of its divisors is an integer number (80113254).

Almost surely, 2^1320434091 is an apocalyptic number.

1320434091 is a deficient number, since it is larger than the sum of its proper divisors (602284005).

1320434091 is a wasteful number, since it uses less digits than its factorization.

1320434091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1320434091 is about 36337.7777388767. Note that the first 4 decimals coincide. The cubic root of 1320434091 is about 1097.0815450429.

The spelling of 1320434091 in words is "one billion, three hundred twenty million, four hundred thirty-four thousand, ninety-one".