99366521 has 4 divisors (see below), whose sum is σ = 100563792. Its totient is φ = 98169252.

The previous prime is 99366517. The next prime is 99366541. The reversal of 99366521 is 12566399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12566399 = 461 ⋅27259.

It is a cyclic number.

It is not a de Polignac number, because 99366521 - 2² = 99366517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99366541) 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, 598511 + ... + 598676.

It is an arithmetic number, because the mean of its divisors is an integer number (25140948).

Almost surely, 2^99366521 is an apocalyptic number.

It is an amenable number.

99366521 is a deficient number, since it is larger than the sum of its proper divisors (1197271).

99366521 is a wasteful number, since it uses less digits than its factorization.

99366521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197270.

The product of its digits is 87480, while the sum is 41.

The square root of 99366521 is about 9968.2757285300. The cubic root of 99366521 is about 463.1766900854.

The spelling of 99366521 in words is "ninety-nine million, three hundred sixty-six thousand, five hundred twenty-one".