49312809 has 48 divisors (see below), whose sum is σ = 92310400. Its totient is φ = 24634368.

The previous prime is 49312807. The next prime is 49312831. The reversal of 49312809 is 90821394.

It is not a de Polignac number, because 49312809 - 2¹ = 49312807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49312807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13977 + ... + 17145.

Almost surely, 2^49312809 is an apocalyptic number.

It is an amenable number.

49312809 is a deficient number, since it is larger than the sum of its proper divisors (42997591).

49312809 is a wasteful number, since it uses less digits than its factorization.

49312809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214 (or 3211 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 49312809 is about 7022.3079539422. The cubic root of 49312809 is about 366.7076026839.

The spelling of 49312809 in words is "forty-nine million, three hundred twelve thousand, eight hundred nine".