74939999 has 2 divisors, whose sum is σ = 74940000. Its totient is φ = 74939998.

The previous prime is 74939993. The next prime is 74940001. The reversal of 74939999 is 99993947.

It is a strong prime.

It is an emirp because it is prime and its reverse (99993947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74939999 - 2⁴ = 74939983 is a prime.

Together with 74940001, it forms a pair of twin primes.

It is a Chen prime.

74939999 is a modest number, since divided by 9999 gives 7493 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74939993) 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, 37469999 + 37470000.

It is an arithmetic number, because the mean of its divisors is an integer number (37470000).

Almost surely, 2^74939999 is an apocalyptic number.

74939999 is a deficient number, since it is larger than the sum of its proper divisors (1).

74939999 is an equidigital number, since it uses as much as digits as its factorization.

74939999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4960116, while the sum is 59.

The square root of 74939999 is about 8656.7891853735. The cubic root of 74939999 is about 421.6038430848.

The spelling of 74939999 in words is "seventy-four million, nine hundred thirty-nine thousand, nine hundred ninety-nine".