49509911 has 4 divisors (see below), whose sum is σ = 54010824. Its totient is φ = 45009000.

The previous prime is 49509893. The next prime is 49509913. The reversal of 49509911 is 11990594.

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 49509911 - 2¹⁸ = 49247767 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 (49509913) 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, 2250440 + ... + 2250461.

It is an arithmetic number, because the mean of its divisors is an integer number (13502706).

Almost surely, 2^49509911 is an apocalyptic number.

49509911 is a deficient number, since it is larger than the sum of its proper divisors (4500913).

49509911 is a wasteful number, since it uses less digits than its factorization.

49509911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500912.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 49509911 is about 7036.3279485823. The cubic root of 49509911 is about 367.1955267332.

The spelling of 49509911 in words is "forty-nine million, five hundred nine thousand, nine hundred eleven".