74939993 has 2 divisors, whose sum is σ = 74939994. Its totient is φ = 74939992.

The previous prime is 74939987. The next prime is 74939999. The reversal of 74939993 is 39993947.

It is a balanced prime because it is at equal distance from previous prime (74939987) and next prime (74939999).

It can be written as a sum of positive squares in only one way, i.e., 71284249 + 3655744 = 8443^2 + 1912^2 .

It is a cyclic number.

It is not a de Polignac number, because 74939993 - 2⁶ = 74939929 is a prime.

It is not a weakly prime, because it can be changed into another prime (74939999) 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, 37469996 + 37469997.

It is an arithmetic number, because the mean of its divisors is an integer number (37469997).

Almost surely, 2^74939993 is an apocalyptic number.

It is an amenable number.

74939993 is a deficient number, since it is larger than the sum of its proper divisors (1).

74939993 is an equidigital number, since it uses as much as digits as its factorization.

74939993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 53.

The square root of 74939993 is about 8656.7888388247. The cubic root of 74939993 is about 421.6038318330.

The spelling of 74939993 in words is "seventy-four million, nine hundred thirty-nine thousand, nine hundred ninety-three".