99487945 has 4 divisors (see below), whose sum is σ = 119385540. Its totient is φ = 79590352.

The previous prime is 99487919. The next prime is 99487981. The reversal of 99487945 is 54978499.

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 31326409 + 68161536 = 5597^2 + 8256^2 .

It is a cyclic number.

It is not a de Polignac number, because 99487945 - 2⁹ = 99487433 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9948790 + ... + 9948799.

It is an arithmetic number, because the mean of its divisors is an integer number (29846385).

Almost surely, 2^99487945 is an apocalyptic number.

It is an amenable number.

99487945 is a deficient number, since it is larger than the sum of its proper divisors (19897595).

99487945 is a wasteful number, since it uses less digits than its factorization.

99487945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19897594.

The product of its digits is 3265920, while the sum is 55.

The square root of 99487945 is about 9974.3643907770. The cubic root of 99487945 is about 463.3652776600.

The spelling of 99487945 in words is "ninety-nine million, four hundred eighty-seven thousand, nine hundred forty-five".