1089940769 has 2 divisors, whose sum is σ = 1089940770. Its totient is φ = 1089940768.

The previous prime is 1089940759. The next prime is 1089940837. The reversal of 1089940769 is 9670499801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948640000 + 141300769 = 30800^2 + 11887^2 .

It is an emirp because it is prime and its reverse (9670499801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089940769 is a prime.

It is a super-2 number, since 2×1089940769² = 2375941759856622722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1089940769.

It is not a weakly prime, because it can be changed into another prime (1089940759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544970384 + 544970385.

It is an arithmetic number, because the mean of its divisors is an integer number (544970385).

Almost surely, 2^1089940769 is an apocalyptic number.

It is an amenable number.

1089940769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089940769 is an equidigital number, since it uses as much as digits as its factorization.

1089940769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 1089940769 is about 33014.2509986218. The cubic root of 1089940769 is about 1029.1238249074.

The spelling of 1089940769 in words is "one billion, eighty-nine million, nine hundred forty thousand, seven hundred sixty-nine".