1312399507 has 4 divisors (see below), whose sum is σ = 1389599496. Its totient is φ = 1235199520.

The previous prime is 1312399499. The next prime is 1312399511. The reversal of 1312399507 is 7059932131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7059932131 = 7 ⋅1008561733.

It is a cyclic number.

It is not a de Polignac number, because 1312399507 - 2³ = 1312399499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312399507.

It is not an unprimeable number, because it can be changed into a prime (1312399537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38599969 + ... + 38600002.

It is an arithmetic number, because the mean of its divisors is an integer number (347399874).

Almost surely, 2^1312399507 is an apocalyptic number.

1312399507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1312399507 is a deficient number, since it is larger than the sum of its proper divisors (77199989).

1312399507 is an equidigital number, since it uses as much as digits as its factorization.

1312399507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77199988.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 1312399507 is about 36227.0549037594. The cubic root of 1312399507 is about 1094.8518407021.

The spelling of 1312399507 in words is "one billion, three hundred twelve million, three hundred ninety-nine thousand, five hundred seven".