74774129 has 2 divisors, whose sum is σ = 74774130. Its totient is φ = 74774128.

The previous prime is 74774111. The next prime is 74774137. The reversal of 74774129 is 92147747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69689104 + 5085025 = 8348^2 + 2255^2 .

It is an emirp because it is prime and its reverse (92147747) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74774129 is a prime.

It is not a weakly prime, because it can be changed into another prime (74774159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37387064 + 37387065.

It is an arithmetic number, because the mean of its divisors is an integer number (37387065).

Almost surely, 2^74774129 is an apocalyptic number.

It is an amenable number.

74774129 is a deficient number, since it is larger than the sum of its proper divisors (1).

74774129 is an equidigital number, since it uses as much as digits as its factorization.

74774129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 74774129 is about 8647.2035364041. The cubic root of 74774129 is about 421.2925581073.

The spelling of 74774129 in words is "seventy-four million, seven hundred seventy-four thousand, one hundred twenty-nine".