99774321 has 4 divisors (see below), whose sum is σ = 133032432. Its totient is φ = 66516212.

The previous prime is 99774313. The next prime is 99774359. The reversal of 99774321 is 12347799.

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: 12347799 = 3 ⋅4115933.

It is a cyclic number.

It is not a de Polignac number, because 99774321 - 2³ = 99774313 is a prime.

It is a super-2 number, since 2×99774321² = 19909830262022082, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99773321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16629051 + ... + 16629056.

It is an arithmetic number, because the mean of its divisors is an integer number (33258108).

Almost surely, 2^99774321 is an apocalyptic number.

It is an amenable number.

99774321 is a deficient number, since it is larger than the sum of its proper divisors (33258111).

99774321 is a wasteful number, since it uses less digits than its factorization.

99774321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33258110.

The product of its digits is 95256, while the sum is 42.

The square root of 99774321 is about 9988.7096764297. The cubic root of 99774321 is about 463.8094506551.

The spelling of 99774321 in words is "ninety-nine million, seven hundred seventy-four thousand, three hundred twenty-one".