1365991459 has 16 divisors (see below), whose sum is σ = 1644844032. Its totient is φ = 1109056608.

The previous prime is 1365991457. The next prime is 1365991481. The reversal of 1365991459 is 9541995631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1365991459 - 2¹ = 1365991457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1365991457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24604 + ... + 57769.

It is an arithmetic number, because the mean of its divisors is an integer number (102802752).

Almost surely, 2^1365991459 is an apocalyptic number.

1365991459 is a deficient number, since it is larger than the sum of its proper divisors (278852573).

1365991459 is a wasteful number, since it uses less digits than its factorization.

1365991459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82506.

The product of its digits is 1312200, while the sum is 52.

The square root of 1365991459 is about 36959.3216793815. The cubic root of 1365991459 is about 1109.5562598795.

The spelling of 1365991459 in words is "one billion, three hundred sixty-five million, nine hundred ninety-one thousand, four hundred fifty-nine".