1365513887 has 4 divisors (see below), whose sum is σ = 1424884080. Its totient is φ = 1306143696.

The previous prime is 1365513859. The next prime is 1365513893. The reversal of 1365513887 is 7883155631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1365513887 - 2¹⁴ = 1365497503 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 (1365513827) 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, 29685062 + ... + 29685107.

It is an arithmetic number, because the mean of its divisors is an integer number (356221020).

Almost surely, 2^1365513887 is an apocalyptic number.

1365513887 is a deficient number, since it is larger than the sum of its proper divisors (59370193).

1365513887 is an equidigital number, since it uses as much as digits as its factorization.

1365513887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59370192.

The product of its digits is 604800, while the sum is 47.

The square root of 1365513887 is about 36952.8603358387. The cubic root of 1365513887 is about 1109.4269387276.

The spelling of 1365513887 in words is "one billion, three hundred sixty-five million, five hundred thirteen thousand, eight hundred eighty-seven".