1061312381 has 2 divisors, whose sum is σ = 1061312382. Its totient is φ = 1061312380.

The previous prime is 1061312341. The next prime is 1061312383. The reversal of 1061312381 is 1832131601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658948900 + 402363481 = 25670^2 + 20059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061312381 is a prime.

It is a super-2 number, since 2×1061312381² = 2252767940127778322, which contains 22 as substring.

Together with 1061312383, 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 1061312381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061312383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530656190 + 530656191.

It is an arithmetic number, because the mean of its divisors is an integer number (530656191).

Almost surely, 2^1061312381 is an apocalyptic number.

It is an amenable number.

1061312381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061312381 is an equidigital number, since it uses as much as digits as its factorization.

1061312381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1061312381 is about 32577.7896886821. The cubic root of 1061312381 is about 1020.0334414898.

Adding to 1061312381 its reverse (1832131601), we get a palindrome (2893443982).

The spelling of 1061312381 in words is "one billion, sixty-one million, three hundred twelve thousand, three hundred eighty-one".