49171813 has 2 divisors, whose sum is σ = 49171814. Its totient is φ = 49171812.

The previous prime is 49171799. The next prime is 49171819. The reversal of 49171813 is 31817194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48972004 + 199809 = 6998^2 + 447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49171813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49171819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24585906 + 24585907.

It is an arithmetic number, because the mean of its divisors is an integer number (24585907).

Almost surely, 2^49171813 is an apocalyptic number.

It is an amenable number.

49171813 is a deficient number, since it is larger than the sum of its proper divisors (1).

49171813 is an equidigital number, since it uses as much as digits as its factorization.

49171813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 49171813 is about 7012.2616180516. The cubic root of 49171813 is about 366.3577702397.

The spelling of 49171813 in words is "forty-nine million, one hundred seventy-one thousand, eight hundred thirteen".