1312689430 has 32 divisors (see below), whose sum is σ = 2564055648. Its totient is φ = 480979200.

The previous prime is 1312689421. The next prime is 1312689449. The reversal of 1312689430 is 349862131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312689430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21511 + ... + 55570.

It is an arithmetic number, because the mean of its divisors is an integer number (80126739).

Almost surely, 2^1312689430 is an apocalyptic number.

1312689430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312689430 is a deficient number, since it is larger than the sum of its proper divisors (1251366218).

1312689430 is a wasteful number, since it uses less digits than its factorization.

1312689430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77232.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1312689430 is about 36231.0561535266. The cubic root of 1312689430 is about 1094.9324562356.

The spelling of 1312689430 in words is "one billion, three hundred twelve million, six hundred eighty-nine thousand, four hundred thirty".