1145538903 has 4 divisors (see below), whose sum is σ = 1527385208. Its totient is φ = 763692600.

The previous prime is 1145538883. The next prime is 1145538917. The reversal of 1145538903 is 3098355411.

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

It is not a de Polignac number, because 1145538903 - 2⁶ = 1145538839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145538983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190923148 + ... + 190923153.

It is an arithmetic number, because the mean of its divisors is an integer number (381846302).

Almost surely, 2^1145538903 is an apocalyptic number.

1145538903 is a deficient number, since it is larger than the sum of its proper divisors (381846305).

1145538903 is an equidigital number, since it uses as much as digits as its factorization.

1145538903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381846304.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 1145538903 is about 33845.8107156558. The cubic root of 1145538903 is about 1046.3330600131. Note that the first 3 decimals are identical.

The spelling of 1145538903 in words is "one billion, one hundred forty-five million, five hundred thirty-eight thousand, nine hundred three".