49207721 has 2 divisors, whose sum is σ = 49207722. Its totient is φ = 49207720.

The previous prime is 49207709. The next prime is 49207747. The reversal of 49207721 is 12770294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 21529600 = 5261^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 49207721 - 2⁶ = 49207657 is a prime.

It is not a weakly prime, because it can be changed into another prime (49200721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24603860 + 24603861.

It is an arithmetic number, because the mean of its divisors is an integer number (24603861).

Almost surely, 2^49207721 is an apocalyptic number.

It is an amenable number.

49207721 is a deficient number, since it is larger than the sum of its proper divisors (1).

49207721 is an equidigital number, since it uses as much as digits as its factorization.

49207721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 49207721 is about 7014.8215230325. The cubic root of 49207721 is about 366.4469268324.

The spelling of 49207721 in words is "forty-nine million, two hundred seven thousand, seven hundred twenty-one".