99874321 has 4 divisors (see below), whose sum is σ = 99964852. Its totient is φ = 99783792.

The previous prime is 99874301. The next prime is 99874339. The reversal of 99874321 is 12347899.

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 20575296 + 79299025 = 4536^2 + 8905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99874321 is a prime.

It is a super-2 number, since 2×99874321² = 19949759990422082, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99874301) 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, 43590 + ... + 45823.

It is an arithmetic number, because the mean of its divisors is an integer number (24991213).

Almost surely, 2^99874321 is an apocalyptic number.

It is an amenable number.

99874321 is a deficient number, since it is larger than the sum of its proper divisors (90531).

99874321 is a wasteful number, since it uses less digits than its factorization.

99874321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90530.

The product of its digits is 108864, while the sum is 43.

The square root of 99874321 is about 9993.7140743569. The cubic root of 99874321 is about 463.9643517624.

The spelling of 99874321 in words is "ninety-nine million, eight hundred seventy-four thousand, three hundred twenty-one".