99531001 has 4 divisors (see below), whose sum is σ = 99551232. Its totient is φ = 99510772.

The previous prime is 99530969. The next prime is 99531011. The reversal of 99531001 is 10013599.

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.

It is a cyclic number.

It is not a de Polignac number, because 99531001 - 2⁵ = 99530969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99531011) 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, 2556 + ... + 14338.

It is an arithmetic number, because the mean of its divisors is an integer number (24887808).

Almost surely, 2^99531001 is an apocalyptic number.

It is an amenable number.

99531001 is a deficient number, since it is larger than the sum of its proper divisors (20231).

99531001 is a wasteful number, since it uses less digits than its factorization.

99531001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20230.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 99531001 is about 9976.5224903270. The cubic root of 99531001 is about 463.4321124845.

The spelling of 99531001 in words is "ninety-nine million, five hundred thirty-one thousand, one".