49998809 has 12 divisors (see below), whose sum is σ = 58516416. Its totient is φ = 41848632.

The previous prime is 49998791. The next prime is 49998811. The reversal of 49998809 is 90889994.

It is not a de Polignac number, because 49998809 - 2²⁴ = 33221593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49998869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11012 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (4876368).

Almost surely, 2^49998809 is an apocalyptic number.

It is an amenable number.

49998809 is a deficient number, since it is larger than the sum of its proper divisors (8517607).

49998809 is an equidigital number, since it uses as much as digits as its factorization.

49998809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956 (or 3913 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 49998809 is about 7070.9835949463. The cubic root of 49998809 is about 368.4002247198.

The spelling of 49998809 in words is "forty-nine million, nine hundred ninety-eight thousand, eight hundred nine".