1209813696 has 168 divisors, whose sum is σ = 4268138784. Its totient is φ = 319057920.

The previous prime is 1209813637. The next prime is 1209813713. The reversal of 1209813696 is 6963189021.

It is a happy number.

1209813696 is a `hidden beast` number, since 1 + 209 + 81 + 369 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40876 + ... + 63956.

It is an arithmetic number, because the mean of its divisors is an integer number (25405588).

Almost surely, 2^1209813696 is an apocalyptic number.

1209813696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209813696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134069392).

1209813696 is an abundant number, since it is smaller than the sum of its proper divisors (3058325088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209813696 is a wasteful number, since it uses less digits than its factorization.

1209813696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23119 (or 23106 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1209813696 is about 34782.3762270492. The cubic root of 1209813696 is about 1065.5475436126.

The spelling of 1209813696 in words is "one billion, two hundred nine million, eight hundred thirteen thousand, six hundred ninety-six".