49864991 has 4 divisors (see below), whose sum is σ = 54398184. Its totient is φ = 45331800.

The previous prime is 49864981. The next prime is 49865017. The reversal of 49864991 is 19946894.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49864991 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 (49864921) 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, 2266580 + ... + 2266601.

It is an arithmetic number, because the mean of its divisors is an integer number (13599546).

Almost surely, 2^49864991 is an apocalyptic number.

49864991 is a deficient number, since it is larger than the sum of its proper divisors (4533193).

49864991 is a wasteful number, since it uses less digits than its factorization.

49864991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533192.

The product of its digits is 559872, while the sum is 50.

The square root of 49864991 is about 7061.5147808385. The cubic root of 49864991 is about 368.0712660301.

The spelling of 49864991 in words is "forty-nine million, eight hundred sixty-four thousand, nine hundred ninety-one".