74555993 has 2 divisors, whose sum is σ = 74555994. Its totient is φ = 74555992.

The previous prime is 74555977. The next prime is 74556007. The reversal of 74555993 is 39955547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74097664 + 458329 = 8608^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 74555993 - 2⁴ = 74555977 is a prime.

It is not a weakly prime, because it can be changed into another prime (74555963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37277996 + 37277997.

It is an arithmetic number, because the mean of its divisors is an integer number (37277997).

Almost surely, 2^74555993 is an apocalyptic number.

It is an amenable number.

74555993 is a deficient number, since it is larger than the sum of its proper divisors (1).

74555993 is an equidigital number, since it uses as much as digits as its factorization.

74555993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 47.

The square root of 74555993 is about 8634.5812289885. The cubic root of 74555993 is about 420.8824849778.

The spelling of 74555993 in words is "seventy-four million, five hundred fifty-five thousand, nine hundred ninety-three".