1309065672 has 16 divisors (see below), whose sum is σ = 3272664240. Its totient is φ = 436355216.

The previous prime is 1309065649. The next prime is 1309065689. The reversal of 1309065672 is 2765609031.

It is a super-3 number, since 3×1309065672³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1309065672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27272178 + ... + 27272225.

It is an arithmetic number, because the mean of its divisors is an integer number (204541515).

Almost surely, 2^1309065672 is an apocalyptic number.

1309065672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1309065672 is an abundant number, since it is smaller than the sum of its proper divisors (1963598568).

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

1309065672 is a wasteful number, since it uses less digits than its factorization.

1309065672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54544412 (or 54544408 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 1309065672 is about 36181.0125894785. The cubic root of 1309065672 is about 1093.9239854183.

The spelling of 1309065672 in words is "one billion, three hundred nine million, sixty-five thousand, six hundred seventy-two".