99974321 has 2 divisors, whose sum is σ = 99974322. Its totient is φ = 99974320.

The previous prime is 99974309. The next prime is 99974327. The reversal of 99974321 is 12347999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96805921 + 3168400 = 9839^2 + 1780^2 .

It is an emirp because it is prime and its reverse (12347999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99974321 - 2¹⁸ = 99712177 is a prime.

It is a super-2 number, since 2×99974321² = 19989729718822082, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99974327) 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 as a sum of consecutive naturals, namely, 49987160 + 49987161.

It is an arithmetic number, because the mean of its divisors is an integer number (49987161).

Almost surely, 2^99974321 is an apocalyptic number.

It is an amenable number.

99974321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99974321 is an equidigital number, since it uses as much as digits as its factorization.

99974321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 99974321 is about 9998.7159675630. The cubic root of 99974321 is about 464.1191495068.

The spelling of 99974321 in words is "ninety-nine million, nine hundred seventy-four thousand, three hundred twenty-one".