1097011691 has 2 divisors, whose sum is σ = 1097011692. Its totient is φ = 1097011690.

The previous prime is 1097011651. The next prime is 1097011711. The reversal of 1097011691 is 1961107901.

It is a strong prime.

It is an emirp because it is prime and its reverse (1961107901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1097011691 - 2¹⁸ = 1096749547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1097011651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548505845 + 548505846.

It is an arithmetic number, because the mean of its divisors is an integer number (548505846).

Almost surely, 2^1097011691 is an apocalyptic number.

1097011691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097011691 is an equidigital number, since it uses as much as digits as its factorization.

1097011691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 35.

The square root of 1097011691 is about 33121.1668121762. The cubic root of 1097011691 is about 1031.3444883070.

The spelling of 1097011691 in words is "one billion, ninety-seven million, eleven thousand, six hundred ninety-one".