1072694809 has 2 divisors, whose sum is σ = 1072694810. Its totient is φ = 1072694808.

The previous prime is 1072694801. The next prime is 1072694867. The reversal of 1072694809 is 9084962701.

1072694809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 924342409 + 148352400 = 30403^2 + 12180^2 .

It is an emirp because it is prime and its reverse (9084962701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1072694809 - 2³ = 1072694801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1072694801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536347404 + 536347405.

It is an arithmetic number, because the mean of its divisors is an integer number (536347405).

Almost surely, 2^1072694809 is an apocalyptic number.

It is an amenable number.

1072694809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072694809 is an equidigital number, since it uses as much as digits as its factorization.

1072694809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1072694809 is about 32752.0199224414. The cubic root of 1072694809 is about 1023.6670546524.

The spelling of 1072694809 in words is "one billion, seventy-two million, six hundred ninety-four thousand, eight hundred nine".