1072678809 has 4 divisors (see below), whose sum is σ = 1430238416. Its totient is φ = 715119204.

The previous prime is 1072678799. The next prime is 1072678811. The reversal of 1072678809 is 9088762701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1072678809 - 2⁸ = 1072678553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072674809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178779799 + ... + 178779804.

It is an arithmetic number, because the mean of its divisors is an integer number (357559604).

Almost surely, 2^1072678809 is an apocalyptic number.

It is an amenable number.

1072678809 is a deficient number, since it is larger than the sum of its proper divisors (357559607).

1072678809 is an equidigital number, since it uses as much as digits as its factorization.

1072678809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357559606.

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 1072678809 is about 32751.7756617866. The cubic root of 1072678809 is about 1023.6619650550.

The spelling of 1072678809 in words is "one billion, seventy-two million, six hundred seventy-eight thousand, eight hundred nine".