49817129 has 2 divisors, whose sum is σ = 49817130. Its totient is φ = 49817128.

The previous prime is 49817111. The next prime is 49817143. The reversal of 49817129 is 92171894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 11377129 = 6200^2 + 3373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49817129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (49817179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24908564 + 24908565.

It is an arithmetic number, because the mean of its divisors is an integer number (24908565).

Almost surely, 2^49817129 is an apocalyptic number.

It is an amenable number.

49817129 is a deficient number, since it is larger than the sum of its proper divisors (1).

49817129 is an equidigital number, since it uses as much as digits as its factorization.

49817129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 49817129 is about 7058.1250343133. The cubic root of 49817129 is about 367.9534661741.

The spelling of 49817129 in words is "forty-nine million, eight hundred seventeen thousand, one hundred twenty-nine".