1165139819 has 8 divisors (see below), whose sum is σ = 1222594560. Its totient is φ = 1108251496.

The previous prime is 1165139809. The next prime is 1165139827. The reversal of 1165139819 is 9189315611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1165139819 - 2¹² = 1165135723 is a prime.

It is a super-2 number, since 2×1165139819² = 2715101595638705522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165139819.

It is not an unprimeable number, because it can be changed into a prime (1165139809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137387 + ... + 145620.

It is an arithmetic number, because the mean of its divisors is an integer number (152824320).

Almost surely, 2^1165139819 is an apocalyptic number.

1165139819 is a deficient number, since it is larger than the sum of its proper divisors (57454741).

1165139819 is a wasteful number, since it uses less digits than its factorization.

1165139819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283209.

The product of its digits is 58320, while the sum is 44.

The square root of 1165139819 is about 34134.1444744115. The cubic root of 1165139819 is about 1052.2671553643.

The spelling of 1165139819 in words is "one billion, one hundred sixty-five million, one hundred thirty-nine thousand, eight hundred nineteen".