1023403503 has 8 divisors (see below), whose sum is σ = 1372077616. Its totient is φ = 678499200.

The previous prime is 1023403489. The next prime is 1023403543. The reversal of 1023403503 is 3053043201.

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

It is not a de Polignac number, because 1023403503 - 2¹² = 1023399407 is a prime.

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 1023403503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023403543) 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, 941818 + ... + 942903.

It is an arithmetic number, because the mean of its divisors is an integer number (171509702).

Almost surely, 2^1023403503 is an apocalyptic number.

1023403503 is a deficient number, since it is larger than the sum of its proper divisors (348674113).

1023403503 is a wasteful number, since it uses less digits than its factorization.

1023403503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884905.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 1023403503 is about 31990.6783766772. The cubic root of 1023403503 is about 1007.7410885873.

Adding to 1023403503 its reverse (3053043201), we get a palindrome (4076446704).

The spelling of 1023403503 in words is "one billion, twenty-three million, four hundred three thousand, five hundred three".