1129890819 has 4 divisors (see below), whose sum is σ = 1506521096. Its totient is φ = 753260544.

The previous prime is 1129890787. The next prime is 1129890859. The reversal of 1129890819 is 9180989211.

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

It is not a de Polignac number, because 1129890819 - 2⁵ = 1129890787 is a prime.

It is a super-2 number, since 2×1129890819² = 2553306525720981522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129890859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188315134 + ... + 188315139.

It is an arithmetic number, because the mean of its divisors is an integer number (376630274).

Almost surely, 2^1129890819 is an apocalyptic number.

1129890819 is a deficient number, since it is larger than the sum of its proper divisors (376630277).

1129890819 is an equidigital number, since it uses as much as digits as its factorization.

1129890819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376630276.

The product of its (nonzero) digits is 93312, while the sum is 48.

The square root of 1129890819 is about 33613.8486192819. The cubic root of 1129890819 is about 1041.5468902692.

The spelling of 1129890819 in words is "one billion, one hundred twenty-nine million, eight hundred ninety thousand, eight hundred nineteen".