49998569 has 4 divisors (see below), whose sum is σ = 50484096. Its totient is φ = 49513044.

The previous prime is 49998563. The next prime is 49998587. The reversal of 49998569 is 96589994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96589994 = 2 ⋅48294997.

It is a cyclic number.

It is not a de Polignac number, because 49998569 - 2⁸ = 49998313 is a prime.

It is a super-2 number, since 2×49998569² = 4999713804095522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49998563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242609 + ... + 242814.

It is an arithmetic number, because the mean of its divisors is an integer number (12621024).

Almost surely, 2^49998569 is an apocalyptic number.

It is an amenable number.

49998569 is a deficient number, since it is larger than the sum of its proper divisors (485527).

49998569 is a wasteful number, since it uses less digits than its factorization.

49998569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485526.

The product of its digits is 6298560, while the sum is 59.

The square root of 49998569 is about 7070.9666241611. The cubic root of 49998569 is about 368.3996352645.

The spelling of 49998569 in words is "forty-nine million, nine hundred ninety-eight thousand, five hundred sixty-nine".