1012003403 has 4 divisors (see below), whose sum is σ = 1065266760. Its totient is φ = 958740048.

The previous prime is 1012003397. The next prime is 1012003411. The reversal of 1012003403 is 3043002101.

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

It is a cyclic number.

It is not a de Polignac number, because 1012003403 - 2¹⁸ = 1011741259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012003423) 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, 26631650 + ... + 26631687.

It is an arithmetic number, because the mean of its divisors is an integer number (266316690).

Almost surely, 2^1012003403 is an apocalyptic number.

1012003403 is a deficient number, since it is larger than the sum of its proper divisors (53263357).

1012003403 is an equidigital number, since it uses as much as digits as its factorization.

1012003403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53263356.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1012003403 is about 31812.0009273230. Note that the first 3 decimals coincide. The cubic root of 1012003403 is about 1003.9852311680.

Adding to 1012003403 its reverse (3043002101), we get a palindrome (4055005504).

The spelling of 1012003403 in words is "one billion, twelve million, three thousand, four hundred three".