9945503 has 4 divisors (see below), whose sum is σ = 10133208. Its totient is φ = 9757800.

The previous prime is 9945461. The next prime is 9945511. The reversal of 9945503 is 3055499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3055499 = 599 ⋅5101.

It is a cyclic number.

It is not a de Polignac number, because 9945503 - 2²² = 5751199 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 (9945553) 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, 93773 + ... + 93878.

It is an arithmetic number, because the mean of its divisors is an integer number (2533302).

Almost surely, 2^9945503 is an apocalyptic number.

9945503 is a deficient number, since it is larger than the sum of its proper divisors (187705).

9945503 is a wasteful number, since it uses less digits than its factorization.

9945503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187704.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 9945503 is about 3153.6491561364. The cubic root of 9945503 is about 215.0513884735.

The spelling of 9945503 in words is "nine million, nine hundred forty-five thousand, five hundred three".