1020357403 has 4 divisors (see below), whose sum is σ = 1098846448. Its totient is φ = 941868360.

The previous prime is 1020357397. The next prime is 1020357407. The reversal of 1020357403 is 3047530201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020357403 is a prime.

It is a super-2 number, since 2×1020357403² = 2082258459713808818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020357407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39244503 + ... + 39244528.

It is an arithmetic number, because the mean of its divisors is an integer number (274711612).

Almost surely, 2^1020357403 is an apocalyptic number.

1020357403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020357403 is a deficient number, since it is larger than the sum of its proper divisors (78489045).

1020357403 is an equidigital number, since it uses as much as digits as its factorization.

1020357403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78489044.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 1020357403 is about 31943.0337162894. The cubic root of 1020357403 is about 1006.7402677182.

Adding to 1020357403 its reverse (3047530201), we get a palindrome (4067887604).

The spelling of 1020357403 in words is "one billion, twenty million, three hundred fifty-seven thousand, four hundred three".