1315945779 has 8 divisors (see below), whose sum is σ = 1764737232. Its totient is φ = 872225760.

The previous prime is 1315945769. The next prime is 1315945783. The reversal of 1315945779 is 9775495131.

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

It is not a de Polignac number, because 1315945779 - 2⁷ = 1315945651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315945769) 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, 1267252 + ... + 1268289.

It is an arithmetic number, because the mean of its divisors is an integer number (220592154).

Almost surely, 2^1315945779 is an apocalyptic number.

1315945779 is a deficient number, since it is larger than the sum of its proper divisors (448791453).

1315945779 is a wasteful number, since it uses less digits than its factorization.

1315945779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535717.

The product of its digits is 1190700, while the sum is 51.

The square root of 1315945779 is about 36275.9669616125. The cubic root of 1315945779 is about 1095.8370972275.

The spelling of 1315945779 in words is "one billion, three hundred fifteen million, nine hundred forty-five thousand, seven hundred seventy-nine".