1091346590729 has 2 divisors, whose sum is σ = 1091346590730. Its totient is φ = 1091346590728.

The previous prime is 1091346590647. The next prime is 1091346590749. The reversal of 1091346590729 is 9270956431901.

1091346590729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843546728704 + 247799862025 = 918448^2 + 497795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091346590729 is a prime.

It is a super-2 number, since 2×1091346590729² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1091346590749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545673295364 + 545673295365.

It is an arithmetic number, because the mean of its divisors is an integer number (545673295365).

Almost surely, 2^{1091346590729} is an apocalyptic number.

It is an amenable number.

1091346590729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091346590729 is an equidigital number, since it uses as much as digits as its factorization.

1091346590729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 1091346590729 in words is "one trillion, ninety-one billion, three hundred forty-six million, five hundred ninety thousand, seven hundred twenty-nine".