99840453 has 24 divisors (see below), whose sum is σ = 139930560. Its totient is φ = 63282240.

The previous prime is 99840443. The next prime is 99840457. The reversal of 99840453 is 35404899.

It is not a de Polignac number, because 99840453 - 2⁸ = 99840197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99840457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227208 + ... + 227646.

It is an arithmetic number, because the mean of its divisors is an integer number (5830440).

Almost surely, 2^99840453 is an apocalyptic number.

It is an amenable number.

99840453 is a deficient number, since it is larger than the sum of its proper divisors (40090107).

99840453 is a wasteful number, since it uses less digits than its factorization.

99840453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 99840453 is about 9992.0194655535. The cubic root of 99840453 is about 463.9119014394.

The spelling of 99840453 in words is "ninety-nine million, eight hundred forty thousand, four hundred fifty-three".