1399330091 has 2 divisors, whose sum is σ = 1399330092. Its totient is φ = 1399330090.

The previous prime is 1399330067. The next prime is 1399330139. The reversal of 1399330091 is 1900339931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399330091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399338091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699665045 + 699665046.

It is an arithmetic number, because the mean of its divisors is an integer number (699665046).

Almost surely, 2^1399330091 is an apocalyptic number.

1399330091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399330091 is an equidigital number, since it uses as much as digits as its factorization.

1399330091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 38.

The square root of 1399330091 is about 37407.6207610161. The cubic root of 1399330091 is about 1118.5104803299.

The spelling of 1399330091 in words is "one billion, three hundred ninety-nine million, three hundred thirty thousand, ninety-one".