49813609 has 4 divisors (see below), whose sum is σ = 49833604. Its totient is φ = 49793616.

The previous prime is 49813601. The next prime is 49813627. The reversal of 49813609 is 90631894.

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 40602384 + 9211225 = 6372^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 49813609 - 2³ = 49813601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49813601) 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, 5622 + ... + 11455.

It is an arithmetic number, because the mean of its divisors is an integer number (12458401).

Almost surely, 2^49813609 is an apocalyptic number.

It is an amenable number.

49813609 is a deficient number, since it is larger than the sum of its proper divisors (19995).

49813609 is a wasteful number, since it uses less digits than its factorization.

49813609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19994.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 49813609 is about 7057.8756719002. The cubic root of 49813609 is about 367.9447996322.

The spelling of 49813609 in words is "forty-nine million, eight hundred thirteen thousand, six hundred nine".