49889669 has 4 divisors (see below), whose sum is σ = 49904844. Its totient is φ = 49874496.

The previous prime is 49889629. The next prime is 49889677. The reversal of 49889669 is 96698894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96698894 = 2 ⋅48349447.

It can be written as a sum of positive squares in 2 ways, for example, as 13432225 + 36457444 = 3665^2 + 6038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49889669 is a prime.

It is a super-2 number, since 2×49889669² = 4977958145859122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49889629) 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, 362 + ... + 9995.

It is an arithmetic number, because the mean of its divisors is an integer number (12476211).

Almost surely, 2^49889669 is an apocalyptic number.

It is an amenable number.

49889669 is a deficient number, since it is larger than the sum of its proper divisors (15175).

49889669 is a wasteful number, since it uses less digits than its factorization.

49889669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15174.

The product of its digits is 6718464, while the sum is 59.

The square root of 49889669 is about 7063.2619235025. The cubic root of 49889669 is about 368.1319750534.

The spelling of 49889669 in words is "forty-nine million, eight hundred eighty-nine thousand, six hundred sixty-nine".