49764989 has 4 divisors (see below), whose sum is σ = 49944924. Its totient is φ = 49585056.

The previous prime is 49764961. The next prime is 49764991. The reversal of 49764989 is 98946794.

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 27984100 + 21780889 = 5290^2 + 4667^2 .

It is a cyclic number.

It is not a de Polignac number, because 49764989 - 2⁸ = 49764733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49764929) 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, 89552 + ... + 90105.

It is an arithmetic number, because the mean of its divisors is an integer number (12486231).

Almost surely, 2^49764989 is an apocalyptic number.

It is an amenable number.

49764989 is a deficient number, since it is larger than the sum of its proper divisors (179935).

49764989 is a wasteful number, since it uses less digits than its factorization.

49764989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179934.

The product of its digits is 3919104, while the sum is 56.

The square root of 49764989 is about 7054.4304518508. The cubic root of 49764989 is about 367.8250512345.

The spelling of 49764989 in words is "forty-nine million, seven hundred sixty-four thousand, nine hundred eighty-nine".