49489639 has 4 divisors (see below), whose sum is σ = 49746256. Its totient is φ = 49233024.

The previous prime is 49489621. The next prime is 49489673. The reversal of 49489639 is 93698494.

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

It is a cyclic number.

It is not a de Polignac number, because 49489639 - 2⁷ = 49489511 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 (49489039) 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, 128019 + ... + 128404.

It is an arithmetic number, because the mean of its divisors is an integer number (12436564).

Almost surely, 2^49489639 is an apocalyptic number.

49489639 is a deficient number, since it is larger than the sum of its proper divisors (256617).

49489639 is a wasteful number, since it uses less digits than its factorization.

49489639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256616.

The product of its digits is 1679616, while the sum is 52.

The square root of 49489639 is about 7034.8872769931. The cubic root of 49489639 is about 367.1454034094.

The spelling of 49489639 in words is "forty-nine million, four hundred eighty-nine thousand, six hundred thirty-nine".