1319397871 has 8 divisors (see below), whose sum is σ = 1447297488. Its totient is φ = 1192824000.

The previous prime is 1319397857. The next prime is 1319397889. The reversal of 1319397871 is 1787939131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1319397871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1319397811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329350 + ... + 333331.

It is an arithmetic number, because the mean of its divisors is an integer number (180912186).

Almost surely, 2^1319397871 is an apocalyptic number.

1319397871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1319397871 is a deficient number, since it is larger than the sum of its proper divisors (127899617).

1319397871 is a wasteful number, since it uses less digits than its factorization.

1319397871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662873.

The product of its digits is 285768, while the sum is 49.

The square root of 1319397871 is about 36323.5167763255. The cubic root of 1319397871 is about 1096.7944891039.

The spelling of 1319397871 in words is "one billion, three hundred nineteen million, three hundred ninety-seven thousand, eight hundred seventy-one".