1089981365 has 16 divisors (see below), whose sum is σ = 1430507520. Its totient is φ = 790701120.

The previous prime is 1089981353. The next prime is 1089981377. The reversal of 1089981365 is 5631899801.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1089981353) and next prime (1089981377).

It is not a de Polignac number, because 1089981365 - 2⁴ = 1089981349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3125 + ... + 46794.

It is an arithmetic number, because the mean of its divisors is an integer number (89406720).

Almost surely, 2^1089981365 is an apocalyptic number.

It is an amenable number.

1089981365 is a deficient number, since it is larger than the sum of its proper divisors (340526155).

1089981365 is a wasteful number, since it uses less digits than its factorization.

1089981365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50332.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1089981365 is about 33014.8658182946. The cubic root of 1089981365 is about 1029.1366016849.

The spelling of 1089981365 in words is "one billion, eighty-nine million, nine hundred eighty-one thousand, three hundred sixty-five".