49681889 has 4 divisors (see below), whose sum is σ = 49861524. Its totient is φ = 49502256.

The previous prime is 49681883. The next prime is 49681897. The reversal of 49681889 is 98818694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30030400 + 19651489 = 5480^2 + 4433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49681889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49681889.

It is not an unprimeable number, because it can be changed into a prime (49681883) 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, 89402 + ... + 89955.

It is an arithmetic number, because the mean of its divisors is an integer number (12465381).

Almost surely, 2^49681889 is an apocalyptic number.

It is an amenable number.

49681889 is a deficient number, since it is larger than the sum of its proper divisors (179635).

49681889 is a wasteful number, since it uses less digits than its factorization.

49681889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179634.

The product of its digits is 995328, while the sum is 53.

The square root of 49681889 is about 7048.5380753742. The cubic root of 49681889 is about 367.6201997794.

The spelling of 49681889 in words is "forty-nine million, six hundred eighty-one thousand, eight hundred eighty-nine".