49887889 has 4 divisors (see below), whose sum is σ = 49906240. Its totient is φ = 49869540.

The previous prime is 49887881. The next prime is 49887899. The reversal of 49887889 is 98878894.

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: 98878894 = 2 ⋅49439447.

It is a cyclic number.

It is not a de Polignac number, because 49887889 - 2³ = 49887881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49887881) 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, 4197 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (12476560).

Almost surely, 2^49887889 is an apocalyptic number.

It is an amenable number.

49887889 is a deficient number, since it is larger than the sum of its proper divisors (18351).

49887889 is a wasteful number, since it uses less digits than its factorization.

49887889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18350.

The product of its digits is 9289728, while the sum is 61.

The square root of 49887889 is about 7063.1359182731. The cubic root of 49887889 is about 368.1275968409.

The spelling of 49887889 in words is "forty-nine million, eight hundred eighty-seven thousand, eight hundred eighty-nine".