74317729 has 2 divisors, whose sum is σ = 74317730. Its totient is φ = 74317728.

The previous prime is 74317709. The next prime is 74317769. The reversal of 74317729 is 92771347.

It is an a-pointer prime, because the next prime (74317769) can be obtained adding 74317729 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61701025 + 12616704 = 7855^2 + 3552^2 .

It is a cyclic number.

It is not a de Polignac number, because 74317729 - 2¹³ = 74309537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74317691 and 74317700.

It is not a weakly prime, because it can be changed into another prime (74317709) 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, 37158864 + 37158865.

It is an arithmetic number, because the mean of its divisors is an integer number (37158865).

Almost surely, 2^74317729 is an apocalyptic number.

It is an amenable number.

74317729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74317729 is an equidigital number, since it uses as much as digits as its factorization.

74317729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 40.

The square root of 74317729 is about 8620.7731091823. The cubic root of 74317729 is about 420.4336582832.

The spelling of 74317729 in words is "seventy-four million, three hundred seventeen thousand, seven hundred twenty-nine".