1379687865 has 16 divisors (see below), whose sum is σ = 2208896448. Its totient is φ = 735368256.

The previous prime is 1379687863. The next prime is 1379687929. The reversal of 1379687865 is 5687869731.

It is not a de Polignac number, because 1379687865 - 2¹ = 1379687863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1379687799 and 1379687808.

It is not an unprimeable number, because it can be changed into a prime (1379687861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3862 + ... + 52671.

It is an arithmetic number, because the mean of its divisors is an integer number (138056028).

Almost surely, 2^1379687865 is an apocalyptic number.

1379687865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1379687865 is a deficient number, since it is larger than the sum of its proper divisors (829208583).

1379687865 is a wasteful number, since it uses less digits than its factorization.

1379687865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58168.

The product of its digits is 15240960, while the sum is 60.

The square root of 1379687865 is about 37144.1498085499. The cubic root of 1379687865 is about 1113.2523352832.

The spelling of 1379687865 in words is "one billion, three hundred seventy-nine million, six hundred eighty-seven thousand, eight hundred sixty-five".