99212387 has 8 divisors (see below), whose sum is σ = 100728000. Its totient is φ = 97703424.

The previous prime is 99212383. The next prime is 99212417. The reversal of 99212387 is 78321299.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99212387 - 2² = 99212383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99212383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34073 + ... + 36869.

It is an arithmetic number, because the mean of its divisors is an integer number (12591000).

Almost surely, 2^99212387 is an apocalyptic number.

99212387 is a deficient number, since it is larger than the sum of its proper divisors (1515613).

99212387 is a wasteful number, since it uses less digits than its factorization.

99212387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325.

The product of its digits is 54432, while the sum is 41.

The square root of 99212387 is about 9960.5415013442. The cubic root of 99212387 is about 462.9370781238.

It can be divided in two parts, 99212 and 387, that added together give a palindrome (99599).

The spelling of 99212387 in words is "ninety-nine million, two hundred twelve thousand, three hundred eighty-seven".