99974549 has 2 divisors, whose sum is σ = 99974550. Its totient is φ = 99974548.

The previous prime is 99974531. The next prime is 99974551. The reversal of 99974549 is 94547999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58629649 + 41344900 = 7657^2 + 6430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99974549 is a prime.

Together with 99974551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99974494 and 99974503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99974249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49987274 + 49987275.

It is an arithmetic number, because the mean of its divisors is an integer number (49987275).

Almost surely, 2^99974549 is an apocalyptic number.

It is an amenable number.

99974549 is a deficient number, since it is larger than the sum of its proper divisors (1).

99974549 is an equidigital number, since it uses as much as digits as its factorization.

99974549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 99974549 is about 9998.7273690205. The cubic root of 99974549 is about 464.1195023277.

The spelling of 99974549 in words is "ninety-nine million, nine hundred seventy-four thousand, five hundred forty-nine".