74909129 has 2 divisors, whose sum is σ = 74909130. Its totient is φ = 74909128.

The previous prime is 74909099. The next prime is 74909141. The reversal of 74909129 is 92190947.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46308025 + 28601104 = 6805^2 + 5348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74909129 is a prime.

It is a super-2 number, since 2×74909129² = 11222755215077282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74909629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37454564 + 37454565.

It is an arithmetic number, because the mean of its divisors is an integer number (37454565).

Almost surely, 2^74909129 is an apocalyptic number.

It is an amenable number.

74909129 is a deficient number, since it is larger than the sum of its proper divisors (1).

74909129 is an equidigital number, since it uses as much as digits as its factorization.

74909129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 74909129 is about 8655.0060080857. The cubic root of 74909129 is about 421.5459447738.

The spelling of 74909129 in words is "seventy-four million, nine hundred nine thousand, one hundred twenty-nine".