1071061091 has 2 divisors, whose sum is σ = 1071061092. Its totient is φ = 1071061090.

The previous prime is 1071061039. The next prime is 1071061093. The reversal of 1071061091 is 1901601701.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071061091 is a prime.

It is a super-2 number, since 2×1071061091² = 2294343721308220562, which contains 22 as substring.

Together with 1071061093, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1071061091.

It is not a weakly prime, because it can be changed into another prime (1071061093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535530545 + 535530546.

It is an arithmetic number, because the mean of its divisors is an integer number (535530546).

Almost surely, 2^1071061091 is an apocalyptic number.

1071061091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071061091 is an equidigital number, since it uses as much as digits as its factorization.

1071061091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 1071061091 is about 32727.0696977288. The cubic root of 1071061091 is about 1023.1471077506.

Adding to 1071061091 its reverse (1901601701), we get a palindrome (2972662792).

The spelling of 1071061091 in words is "one billion, seventy-one million, sixty-one thousand, ninety-one".