1070813809 has 4 divisors (see below), whose sum is σ = 1153184116. Its totient is φ = 988443504.

The previous prime is 1070813801. The next prime is 1070813839. The reversal of 1070813809 is 9083180701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 687750625 + 383063184 = 26225^2 + 19572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1070813809 - 2³ = 1070813801 is a prime.

It is a super-2 number, since 2×1070813809² = 2293284427090176962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1070813801) 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, 41185134 + ... + 41185159.

It is an arithmetic number, because the mean of its divisors is an integer number (288296029).

Almost surely, 2^1070813809 is an apocalyptic number.

It is an amenable number.

1070813809 is a deficient number, since it is larger than the sum of its proper divisors (82370307).

1070813809 is an equidigital number, since it uses as much as digits as its factorization.

1070813809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82370306.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1070813809 is about 32723.2915367632. The cubic root of 1070813809 is about 1023.0683617486.

The spelling of 1070813809 in words is "one billion, seventy million, eight hundred thirteen thousand, eight hundred nine".