1320974091 has 6 divisors (see below), whose sum is σ = 1908073700. Its totient is φ = 880649388.

The previous prime is 1320974087. The next prime is 1320974131. The reversal of 1320974091 is 1904790231.

It is not a de Polignac number, because 1320974091 - 2² = 1320974087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320974021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73387441 + ... + 73387458.

Almost surely, 2^1320974091 is an apocalyptic number.

1320974091 is a deficient number, since it is larger than the sum of its proper divisors (587099609).

1320974091 is a wasteful number, since it uses less digits than its factorization.

1320974091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146774905 (or 146774902 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1320974091 is about 36345.2072631317. The cubic root of 1320974091 is about 1097.2310775081.

The spelling of 1320974091 in words is "one billion, three hundred twenty million, nine hundred seventy-four thousand, ninety-one".