74279917 has 2 divisors, whose sum is σ = 74279918. Its totient is φ = 74279916.

The previous prime is 74279837. The next prime is 74279921. The reversal of 74279917 is 71997247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62315236 + 11964681 = 7894^2 + 3459^2 .

It is a cyclic number.

It is not a de Polignac number, because 74279917 - 2¹¹ = 74277869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74279957) 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, 37139958 + 37139959.

It is an arithmetic number, because the mean of its divisors is an integer number (37139959).

Almost surely, 2^74279917 is an apocalyptic number.

It is an amenable number.

74279917 is a deficient number, since it is larger than the sum of its proper divisors (1).

74279917 is an equidigital number, since it uses as much as digits as its factorization.

74279917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 46.

The square root of 74279917 is about 8618.5797553889. The cubic root of 74279917 is about 420.3623422612.

The spelling of 74279917 in words is "seventy-four million, two hundred seventy-nine thousand, nine hundred seventeen".