49120909 has 6 divisors (see below), whose sum is σ = 51842670. Its totient is φ = 46535256.

The previous prime is 49120901. The next prime is 49120913. The reversal of 49120909 is 90902194.

It can be written as a sum of positive squares in only one way, i.e., 40998409 + 8122500 = 6403^2 + 2850^2 .

It is not a de Polignac number, because 49120909 - 2³ = 49120901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49120901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67674 + ... + 68395.

It is an arithmetic number, because the mean of its divisors is an integer number (8640445).

Almost surely, 2^49120909 is an apocalyptic number.

It is an amenable number.

49120909 is a deficient number, since it is larger than the sum of its proper divisors (2721761).

49120909 is a wasteful number, since it uses less digits than its factorization.

49120909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136107 (or 136088 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 49120909 is about 7008.6310360869. The cubic root of 49120909 is about 366.2313054093.

The spelling of 49120909 in words is "forty-nine million, one hundred twenty thousand, nine hundred nine".