99974129 has 2 divisors, whose sum is σ = 99974130. Its totient is φ = 99974128.

The previous prime is 99974099. The next prime is 99974131. The reversal of 99974129 is 92147999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95023504 + 4950625 = 9748^2 + 2225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99974129 is a prime.

Together with 99974131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99974429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49987064 + 49987065.

It is an arithmetic number, because the mean of its divisors is an integer number (49987065).

Almost surely, 2^99974129 is an apocalyptic number.

It is an amenable number.

99974129 is a deficient number, since it is larger than the sum of its proper divisors (1).

99974129 is an equidigital number, since it uses as much as digits as its factorization.

99974129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 50.

The square root of 99974129 is about 9998.7063663256. The cubic root of 99974129 is about 464.1188523940.

The spelling of 99974129 in words is "ninety-nine million, nine hundred seventy-four thousand, one hundred twenty-nine".