49909109 has 4 divisors (see below), whose sum is σ = 49968204. Its totient is φ = 49850016.

The previous prime is 49909051. The next prime is 49909141. The reversal of 49909109 is 90190994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42902500 + 7006609 = 6550^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 49909109 - 2²⁴ = 33131893 is a prime.

It is a super-2 number, since 2×49909109² = 4981838322347762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49909009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28262 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (12492051).

Almost surely, 2^49909109 is an apocalyptic number.

It is an amenable number.

49909109 is a deficient number, since it is larger than the sum of its proper divisors (59095).

49909109 is an equidigital number, since it uses as much as digits as its factorization.

49909109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59094.

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

The square root of 49909109 is about 7064.6379241968. The cubic root of 49909109 is about 368.1797842585.

The spelling of 49909109 in words is "forty-nine million, nine hundred nine thousand, one hundred nine".