49019909 has 2 divisors, whose sum is σ = 49019910. Its totient is φ = 49019908.

The previous prime is 49019903. The next prime is 49019911. The reversal of 49019909 is 90991094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48302500 + 717409 = 6950^2 + 847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49019909 is a prime.

Together with 49019911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49019903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24509954 + 24509955.

It is an arithmetic number, because the mean of its divisors is an integer number (24509955).

Almost surely, 2^49019909 is an apocalyptic number.

It is an amenable number.

49019909 is a deficient number, since it is larger than the sum of its proper divisors (1).

49019909 is an equidigital number, since it uses as much as digits as its factorization.

49019909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 49019909 is about 7001.4219270088. The cubic root of 49019909 is about 365.9801242354.

The spelling of 49019909 in words is "forty-nine million, nineteen thousand, nine hundred nine".