1209551013 has 24 divisors (see below), whose sum is σ = 1909386336. Its totient is φ = 731743200.

The previous prime is 1209551011. The next prime is 1209551023. The reversal of 1209551013 is 3101559021.

It is not a de Polignac number, because 1209551013 - 2¹ = 1209551011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209551011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45831 + ... + 67227.

It is an arithmetic number, because the mean of its divisors is an integer number (79557764).

Almost surely, 2^1209551013 is an apocalyptic number.

It is an amenable number.

1209551013 is a deficient number, since it is larger than the sum of its proper divisors (699835323).

1209551013 is a wasteful number, since it uses less digits than its factorization.

1209551013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21985 (or 21982 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 1209551013 is about 34778.5999286918. The cubic root of 1209551013 is about 1065.4704183806.

The spelling of 1209551013 in words is "one billion, two hundred nine million, five hundred fifty-one thousand, thirteen".