1969081091 has 2 divisors, whose sum is σ = 1969081092. Its totient is φ = 1969081090.

The previous prime is 1969081073. The next prime is 1969081109. The reversal of 1969081091 is 1901809691.

Together with next prime (1969081109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1969081073) and next prime (1969081109).

It is an emirp because it is prime and its reverse (1901809691) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1601806961 and 1696081061.

It is a cyclic number.

It is not a de Polignac number, because 1969081091 - 2¹⁸ = 1968818947 is a prime.

It is a super-3 number, since 3×1969081091³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1969081031) 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, 984540545 + 984540546.

It is an arithmetic number, because the mean of its divisors is an integer number (984540546).

Almost surely, 2^1969081091 is an apocalyptic number.

1969081091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969081091 is an equidigital number, since it uses as much as digits as its factorization.

1969081091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 1969081091 is about 44374.3291892959. The cubic root of 1969081091 is about 1253.3947383353.

The spelling of 1969081091 in words is "one billion, nine hundred sixty-nine million, eighty-one thousand, ninety-one".