1023430403 has 4 divisors (see below), whose sum is σ = 1026721488. Its totient is φ = 1020139320.

The previous prime is 1023430399. The next prime is 1023430409. The reversal of 1023430403 is 3040343201.

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 1023430403 - 2² = 1023430399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023430409) 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, 1645076 + ... + 1645697.

It is an arithmetic number, because the mean of its divisors is an integer number (256680372).

Almost surely, 2^1023430403 is an apocalyptic number.

1023430403 is a deficient number, since it is larger than the sum of its proper divisors (3291085).

1023430403 is an equidigital number, since it uses as much as digits as its factorization.

1023430403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291084.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1023430403 is about 31991.0988088874. The cubic root of 1023430403 is about 1007.7499179486.

Adding to 1023430403 its reverse (3040343201), we get a palindrome (4063773604).

The spelling of 1023430403 in words is "one billion, twenty-three million, four hundred thirty thousand, four hundred three".