99478517 has 4 divisors (see below), whose sum is σ = 99629676. Its totient is φ = 99327360.

The previous prime is 99478513. The next prime is 99478531. The reversal of 99478517 is 71587499.

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 37871716 + 61606801 = 6154^2 + 7849^2 .

It is a cyclic number.

It is not a de Polignac number, because 99478517 - 2² = 99478513 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 (99478513) 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, 74588 + ... + 75909.

It is an arithmetic number, because the mean of its divisors is an integer number (24907419).

Almost surely, 2^99478517 is an apocalyptic number.

It is an amenable number.

99478517 is a deficient number, since it is larger than the sum of its proper divisors (151159).

99478517 is a wasteful number, since it uses less digits than its factorization.

99478517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151158.

The product of its digits is 635040, while the sum is 50.

The square root of 99478517 is about 9973.8917680111. The cubic root of 99478517 is about 463.3506402221.

The spelling of 99478517 in words is "ninety-nine million, four hundred seventy-eight thousand, five hundred seventeen".