99455561 has 4 divisors (see below), whose sum is σ = 100181652. Its totient is φ = 98729472.

The previous prime is 99455527. The next prime is 99455569. The reversal of 99455561 is 16555499.

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

It can be written as a sum of positive squares in 2 ways, for example, as 87310336 + 12145225 = 9344^2 + 3485^2 .

It is a cyclic number.

It is not a de Polignac number, because 99455561 - 2²⁶ = 32346697 is a prime.

It is a super-2 number, since 2×99455561² = 19782817227649442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99455569) 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, 362840 + ... + 363113.

It is an arithmetic number, because the mean of its divisors is an integer number (25045413).

Almost surely, 2^99455561 is an apocalyptic number.

It is an amenable number.

99455561 is a deficient number, since it is larger than the sum of its proper divisors (726091).

99455561 is a wasteful number, since it uses less digits than its factorization.

99455561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726090.

The product of its digits is 243000, while the sum is 44.

The square root of 99455561 is about 9972.7408970654. The cubic root of 99455561 is about 463.3149960251.

The spelling of 99455561 in words is "ninety-nine million, four hundred fifty-five thousand, five hundred sixty-one".