49309181 has 2 divisors, whose sum is σ = 49309182. Its totient is φ = 49309180.

The previous prime is 49309159. The next prime is 49309207. The reversal of 49309181 is 18190394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 18783556 = 5525^2 + 4334^2 .

It is a cyclic number.

It is not a de Polignac number, because 49309181 - 2¹⁰ = 49308157 is a prime.

It is a super-2 number, since 2×49309181² = 4862790661781522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49309121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24654590 + 24654591.

It is an arithmetic number, because the mean of its divisors is an integer number (24654591).

Almost surely, 2^49309181 is an apocalyptic number.

It is an amenable number.

49309181 is a deficient number, since it is larger than the sum of its proper divisors (1).

49309181 is an equidigital number, since it uses as much as digits as its factorization.

49309181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 49309181 is about 7022.0496295597. The cubic root of 49309181 is about 366.6986094302.

The spelling of 49309181 in words is "forty-nine million, three hundred nine thousand, one hundred eighty-one".