1072805913 has 12 divisors (see below), whose sum is σ = 1578847140. Its totient is φ = 701709216.

The previous prime is 1072805887. The next prime is 1072805917. The reversal of 1072805913 is 3195082701.

It can be written as a sum of positive squares in 2 ways, for example, as 666259344 + 406546569 = 25812^2 + 20163^2 .

It is not a de Polignac number, because 1072805913 - 2⁶ = 1072805849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1072805917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1124058 + ... + 1125011.

It is an arithmetic number, because the mean of its divisors is an integer number (131570595).

Almost surely, 2^1072805913 is an apocalyptic number.

It is an amenable number.

1072805913 is a deficient number, since it is larger than the sum of its proper divisors (506041227).

1072805913 is a wasteful number, since it uses less digits than its factorization.

1072805913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249128 (or 2249125 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1072805913 is about 32753.7160181864. The cubic root of 1072805913 is about 1023.7023954213.

The spelling of 1072805913 in words is "one billion, seventy-two million, eight hundred five thousand, nine hundred thirteen".