1155890803 has 2 divisors, whose sum is σ = 1155890804. Its totient is φ = 1155890802.

The previous prime is 1155890773. The next prime is 1155890837. The reversal of 1155890803 is 3080985511.

It is a weak prime.

It is an emirp because it is prime and its reverse (3080985511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155890803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155890003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577945401 + 577945402.

It is an arithmetic number, because the mean of its divisors is an integer number (577945402).

Almost surely, 2^1155890803 is an apocalyptic number.

1155890803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155890803 is an equidigital number, since it uses as much as digits as its factorization.

1155890803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 1155890803 is about 33998.3941238406. The cubic root of 1155890803 is about 1049.4754153587.

The spelling of 1155890803 in words is "one billion, one hundred fifty-five million, eight hundred ninety thousand, eight hundred three".