1011091097 has 2 divisors, whose sum is σ = 1011091098. Its totient is φ = 1011091096.

The previous prime is 1011091093. The next prime is 1011091127. The reversal of 1011091097 is 7901901101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 947346841 + 63744256 = 30779^2 + 7984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011091097 - 2² = 1011091093 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011091093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505545548 + 505545549.

It is an arithmetic number, because the mean of its divisors is an integer number (505545549).

Almost surely, 2^1011091097 is an apocalyptic number.

It is an amenable number.

1011091097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011091097 is an equidigital number, since it uses as much as digits as its factorization.

1011091097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 29.

The square root of 1011091097 is about 31797.6586716695. The cubic root of 1011091097 is about 1003.6834478863.

Adding to 1011091097 its reverse (7901901101), we get a palindrome (8912992198).

The spelling of 1011091097 in words is "one billion, eleven million, ninety-one thousand, ninety-seven".