1387165365 has 32 divisors (see below), whose sum is σ = 2468816640. Its totient is φ = 738998208.

The previous prime is 1387165363. The next prime is 1387165369. The reversal of 1387165365 is 5635617831.

It is not a de Polignac number, because 1387165365 - 2¹ = 1387165363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1387165365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387165363) 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, 127479 + ... + 137931.

It is an arithmetic number, because the mean of its divisors is an integer number (77150520).

Almost surely, 2^1387165365 is an apocalyptic number.

1387165365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387165365 is a deficient number, since it is larger than the sum of its proper divisors (1081651275).

1387165365 is a wasteful number, since it uses less digits than its factorization.

1387165365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11450 (or 11444 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 1387165365 is about 37244.6689473809. The cubic root of 1387165365 is about 1115.2598789629.

The spelling of 1387165365 in words is "one billion, three hundred eighty-seven million, one hundred sixty-five thousand, three hundred sixty-five".