990045403 has 4 divisors (see below), whose sum is σ = 992658040. Its totient is φ = 987432768.

The previous prime is 990045379. The next prime is 990045421. The reversal of 990045403 is 304540099.

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-990045403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990045443) 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, 1305750 + ... + 1306507.

It is an arithmetic number, because the mean of its divisors is an integer number (248164510).

Almost surely, 2^990045403 is an apocalyptic number.

990045403 is a deficient number, since it is larger than the sum of its proper divisors (2612637).

990045403 is a wasteful number, since it uses less digits than its factorization.

990045403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612636.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 990045403 is about 31464.9869378648. The cubic root of 990045403 is about 996.6707292569.

The spelling of 990045403 in words is "nine hundred ninety million, forty-five thousand, four hundred three".