49309639 has 8 divisors (see below), whose sum is σ = 52275888. Its totient is φ = 46350720.

The previous prime is 49309633. The next prime is 49309661. The reversal of 49309639 is 93690394.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49309639 - 2¹¹ = 49307591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49309595 and 49309604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49309633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18669 + ... + 21145.

It is an arithmetic number, because the mean of its divisors is an integer number (6534486).

Almost surely, 2^49309639 is an apocalyptic number.

49309639 is a deficient number, since it is larger than the sum of its proper divisors (2966249).

49309639 is a wasteful number, since it uses less digits than its factorization.

49309639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 49309639 is about 7022.0822410450. The cubic root of 49309639 is about 366.6997447661.

The spelling of 49309639 in words is "forty-nine million, three hundred nine thousand, six hundred thirty-nine".