1312143099 has 32 divisors (see below), whose sum is σ = 1844312064. Its totient is φ = 828921600.

The previous prime is 1312143089. The next prime is 1312143103. The reversal of 1312143099 is 9903412131.

It is a happy number.

It is not a de Polignac number, because 1312143099 - 2²⁰ = 1311094523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312143089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 671574 + ... + 673524.

It is an arithmetic number, because the mean of its divisors is an integer number (57634752).

Almost surely, 2^1312143099 is an apocalyptic number.

1312143099 is a deficient number, since it is larger than the sum of its proper divisors (532168965).

1312143099 is a wasteful number, since it uses less digits than its factorization.

1312143099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1312143099 is about 36223.5158288093. The cubic root of 1312143099 is about 1094.7805344031.

The spelling of 1312143099 in words is "one billion, three hundred twelve million, one hundred forty-three thousand, ninety-nine".