49447729 has 2 divisors, whose sum is σ = 49447730. Its totient is φ = 49447728.

The previous prime is 49447703. The next prime is 49447733. The reversal of 49447729 is 92774494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40297104 + 9150625 = 6348^2 + 3025^2 .

It is a cyclic number.

It is not a de Polignac number, because 49447729 - 2²¹ = 47350577 is a prime.

It is equal to p_2969866 and since 49447729 and 2969866 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (49447529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24723864 + 24723865.

It is an arithmetic number, because the mean of its divisors is an integer number (24723865).

Almost surely, 2^49447729 is an apocalyptic number.

It is an amenable number.

49447729 is a deficient number, since it is larger than the sum of its proper divisors (1).

49447729 is an equidigital number, since it uses as much as digits as its factorization.

49447729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 49447729 is about 7031.9079203300. The cubic root of 49447729 is about 367.0417358560.

It can be divided in two parts, 49447 and 729, that added together give a square (50176 = 224²).

The spelling of 49447729 in words is "forty-nine million, four hundred forty-seven thousand, seven hundred twenty-nine".