1061069861 has 2 divisors, whose sum is σ = 1061069862. Its totient is φ = 1061069860.

The previous prime is 1061069857. The next prime is 1061069917. The reversal of 1061069861 is 1689601601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595848100 + 465221761 = 24410^2 + 21569^2 .

It is an emirp because it is prime and its reverse (1689601601) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1986901901 and 1091096891.

It is a cyclic number.

It is not a de Polignac number, because 1061069861 - 2² = 1061069857 is a prime.

It is a super-2 number, since 2×1061069861² = 2251738499845118642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061069851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530534930 + 530534931.

It is an arithmetic number, because the mean of its divisors is an integer number (530534931).

Almost surely, 2^1061069861 is an apocalyptic number.

It is an amenable number.

1061069861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061069861 is an equidigital number, since it uses as much as digits as its factorization.

1061069861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1061069861 is about 32574.0673082131. The cubic root of 1061069861 is about 1019.9557397814.

The spelling of 1061069861 in words is "one billion, sixty-one million, sixty-nine thousand, eight hundred sixty-one".