49420909 has 2 divisors, whose sum is σ = 49420910. Its totient is φ = 49420908.

The previous prime is 49420897. The next prime is 49420961. The reversal of 49420909 is 90902494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49420900 + 9 = 7030^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 49420909 - 2¹⁹ = 48896621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49427909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24710454 + 24710455.

It is an arithmetic number, because the mean of its divisors is an integer number (24710455).

Almost surely, 2^49420909 is an apocalyptic number.

It is an amenable number.

49420909 is a deficient number, since it is larger than the sum of its proper divisors (1).

49420909 is an equidigital number, since it uses as much as digits as its factorization.

49420909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 49420909 is about 7030.0006401138. Note that the first 3 decimals coincide. The cubic root of 49420909 is about 366.9753638178.

The spelling of 49420909 in words is "forty-nine million, four hundred twenty thousand, nine hundred nine".