49120009 has 4 divisors (see below), whose sum is σ = 50318100. Its totient is φ = 47921920.

The previous prime is 49120003. The next prime is 49120039. The reversal of 49120009 is 90002194.

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 4963984 + 44156025 = 2228^2 + 6645^2 .

It is a cyclic number.

It is not a de Polignac number, because 49120009 - 2¹³ = 49111817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49120003) 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, 598984 + ... + 599065.

It is an arithmetic number, because the mean of its divisors is an integer number (12579525).

Almost surely, 2^49120009 is an apocalyptic number.

It is an amenable number.

49120009 is a deficient number, since it is larger than the sum of its proper divisors (1198091).

49120009 is a wasteful number, since it uses less digits than its factorization.

49120009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198090.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 49120009 is about 7008.5668292455. The cubic root of 49120009 is about 366.2290686823.

The spelling of 49120009 in words is "forty-nine million, one hundred twenty thousand, nine".