1071061391 has 2 divisors, whose sum is σ = 1071061392. Its totient is φ = 1071061390.

The previous prime is 1071061351. The next prime is 1071061393. The reversal of 1071061391 is 1931601701.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071061391 is a prime.

It is a super-2 number, since 2×1071061391² = 2294345006581709762, which contains 22 as substring.

Together with 1071061393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1071061393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535530695 + 535530696.

It is an arithmetic number, because the mean of its divisors is an integer number (535530696).

Almost surely, 2^1071061391 is an apocalyptic number.

1071061391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071061391 is an equidigital number, since it uses as much as digits as its factorization.

1071061391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1071061391 is about 32727.0742810903. The cubic root of 1071061391 is about 1023.1472032771.

The spelling of 1071061391 in words is "one billion, seventy-one million, sixty-one thousand, three hundred ninety-one".