1391109701 has 2 divisors, whose sum is σ = 1391109702. Its totient is φ = 1391109700.

The previous prime is 1391109691. The next prime is 1391109739. The reversal of 1391109701 is 1079011931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1383765601 + 7344100 = 37199^2 + 2710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391109701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391109791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695554850 + 695554851.

It is an arithmetic number, because the mean of its divisors is an integer number (695554851).

Almost surely, 2^1391109701 is an apocalyptic number.

It is an amenable number.

1391109701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391109701 is an equidigital number, since it uses as much as digits as its factorization.

1391109701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 32.

The square root of 1391109701 is about 37297.5830450178. The cubic root of 1391109701 is about 1116.3159407146.

The spelling of 1391109701 in words is "one billion, three hundred ninety-one million, one hundred nine thousand, seven hundred one".